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Disabling May Lead To Unexpected Shutdowns:  The Truth About iPhone Battery Performance By now, you’ve probably heard that Apple slowed down older iPhones in order to conserve battery life.

If this affected you and made you angry, don’t worry — you can now right this wrong. what’s in the new Battery Health section of the Settings app and show you how to disable Performance

Management on your iPhone!The New Battery Health Section Of Settings AppIn the wake of the announcement that they slowed down older iPhones to spare battery life, Apple has been working on a new “Battery Health” section of the Settings app. was introduced with the iOS 11.3 update, which was released on March 30, 2018.The Battery Health section of the Settings app displays your iPhone battery’s maximum capacity and gives you the ability to disable Performance Management.

How To Disable Performance Management On iPhoneTo disable Performance Management on your iPhone, open the Settings app and tap Battery -> Battery Health. Under Peak Performance Capability, you’ll see a very small Disable… button.After tapping Disable…, a very scary pop-up will appear on the screen saying “Disabling May Lead To Unexpected Shutdowns”.Don’t be afraid — tap Disable and turn off Performance Management.

What is Performance Management?

Performance Management is the now notorious setting that slows down your iPhone in order to make its battery last longer. This feature was secretly implemented when Apple released iOS 10.2.1, but iPhone users didn’t have the ability to turn it off — until now If you update youriPhone to iOS 11.3, you’ll have the ability to disable Performance Management in the Settings app.How To Disable Performance Management On iPhoneTo disable Performance Management on your iPhone, open the Settings app and tap Battery -> Battery Health. Under Peak Performance Capability , you’ll see a very small Disable… button.After tapping Disable…, a very scary pop-up will appear on the screen saying “Disabling May Lead To Unexpected Shutdowns”. Don’t be afraid — tap Disable and turn off Performance Management.What If I Don’t Have The Option To Disable Performance Management?It’s possible that your iPhone battery is in perfectly good health and that Performance Management was never turned on.This was the case for me, as my iPhone’s battery still has a maximum capacity of 94%.

Will Disabling Performance Management Lead To Unexpected Shutdowns?

The truth is that disabling Performance Management could lead to unexpected shutdowns, but unexpected shutdowns are pretty uncommon.We surveyed our iPhone Help Facebook Group to get a feel for how regular iPhone users were being impacted by unexpected shutdowns. More than half of our respondents said they’ve never experienced an unexpected shutdown on an iPhone that was affected by the battery throttling update.Furthermore, we can’t be entirely sure whether or not those who experienced unexpected shutdowns did so because of their iPhone’s battery performance.When Payette Forward Founder David Payette worked at the Apple Store, he handled thousands of iPhones, many of which were put through Apple’s standard battery test.This test is designed to determine whether or not a battery is capable of performing an iPhone’s essential functions.In all his time at the Apple Store, only one iPhone failed the battery test.

This leads us to believe that unexpected shutdowns aren’t as big of a deal as Apple is making them out to be and that they may have had other motivations when deciding to slow down old iPhones.Replacing Your iPhone’s Battery If you’re concerned about your iPhone’s battery health and performance, you may want to consider getting it replaced. Apple is offering $29 battery replacements to anyone with an iPhone 6 or later, if that iPhone was impacted by the battery throttling update. isn’t extended to iPhone 5s, who may have also been affected by Apple’s speed-throttling update.Before heading to your local Apple Store, take this into consideration: if something else is wrong with your iPhone (eg screen cracked or damaged port) , Apple won’t just replace its battery. damaged components as well, which could turn your $29 battery replacement into a repair that costs hundreds of doll ars, especially if your iPhone isn’t covered by AppleCare+.If you want to get your  iPhone battery replaced by Apple, set up an appointment at the Apple Store near you and take it in at your earliest convenience.

A Battery Replacement AlternativeIf you don’t think the Apple Store is the right option for you, we also highly recommend a repair company called Puls. Puls is an on-demand repair service that sends a certified technician directly to you in as little as an hour, whether you’re at home, work, or your favorite local restaurant.All Puls repairs also come with a lifetime warranty.Don’t Expect Unexpected ShutdownsI hope this article helped you understand the new Battery Health section of the Settings app and what Performance Management does to your iPhone. Make sure to share this article on social media so your friends and family can speed up their old iPhones again too!

I’d love to hear from you in the comments section below — did disabling Performance Management cause unexpected shutdowns on your  iphone ?

iPhone offers an easy and efficient way of displaying battery health to track your battery’s capacity. Along with it, it even gives an insight into battery usage. Yet, even with that information sometimes, it is difficult to determine the battery condition completely. cycle count comes to the rescue!
It is one of the best ways to figure out your iPhone’s battery condition.
But what actually is the iPhone charge cycle count? And how to check it on your iPhone? Read on to find out.
What is the iPhone battery cycle count?

The battery cycle count is the number of times a battery is charged to 100%. But there’s a catch! Let me explain this with an example for better clarity and insights into how it works.
Assume that you’re using a fully charged iPhone for a while, and the battery level drains to 65%. This means that 35% of the battery has been used. Now, if you charge to 100% at this point, it won’ t be counted as a complete cycle as you have actually charged only 35%. Hence, the number will cumulate until it sums up to 100%.
So, the next time when you charge 65% battery on your iPhone, it’ll be considered a full cycle.

iPhone Battery Charge Cycles: How to Check Your Battery Log File in Settings

iPhone models have a Battery Health feature that gives you a fair idea of ​​depleting battery capacity over time, as well as tools to optimize battery health and slow down the aging process. While this is a fair indicator of your battery age, you can Also assess the health of your iPhone’s battery by checking its charge cycle count – taking a peep into the logs. A battery cycle count is essentially the number of times your battery has fully drained out battery and then been fully recharged again.
One cycle count is completed only when the iPhone completely depletes 100 percent of the battery. So, even if you charge the iPhone mid-way through the battery drain, a cycle will only be completed when the iPhone depletes its charge completely.

How to Check iPhone Battery Charge Cycle Count

Just like all batteries, [iPhone](https://www.gadgets360.com/tags/iphone) batteries are also consumable components that deplete in capacity over time. If the battery becomes too weak, users may notice reduced battery life and slow performance of the iPhone. According to [Apple](https://www.gadgets360.com/apple), a normal battery is designed to retain up to 80 percent of its original capacity at 500 complete charge cycles when operating under normal conditions. To check whether you’ve reached this milestone or not, users can follow the below mentioned steps. The battery log can only be accessed if the user has enabled sharing of analytics. For checking whether the analytics sharing is enabled, one can check from here -Privacy > Analytics & Information.
1.On your iPhone, head to the Settings app > Privacy > Analytics and Improvements.2.Click on Analytics Data to see a list of log files in alphabetical order. Scroll down to the last file that begins with ‘log-aggregated’.3.Select this file and copy all the content inside. You can also share it on any app that you prefer, but remember that these log files contain huge amount of content.4. Paste the entire log file content into Notes app that is pre-installed on all iPhones.5. Click on the top right action icon and select ‘Find in Note’6.Search for ‘Battery CycleCount’ and the number that shows up after this word is the charge cycle count of your iPhone.

How to Check iPhone’s battery charge cycle count using Notes

1. Open Settings on your iPhone.

2.Tap Privacy & Settings → Tap Analytics & Improvements.

3.Tap Analytics Data.Note: If you haven’t enabled Share iPhone & Watch analytics, you won’t find the Analytics Data option. Additionally, if you turn it on now, you’ll need to wait for a day to get the data.

4.Here, scroll up until you find files with the name log-aggregated.The files are added in alphabetical order.

5.Tap the latest log-aggregated file at the bottom.

6.Double-tap anywhere on the screen and copy the entire text.

7. Now, go to the Notes app.

8.Create a new note and paste the code here.

9.Tap three dots at the top right.

1o.Tap Find in Note.11. Now, type battery cycle count.
Notes will then scroll to the exact location of the entered text in the file and highlight it. A number will be visible below the highlighted text. This number is your iPhone’s current battery cycle count.
So, that’s one way of checking charge cycle count. If this seems a bit lengthy or complicated, there’s another shorter and quicker way of checking the battery cycle.

Find iPhone battery charge cycle count using Shortcut

First, download the View Battery Cycle shortcut on your iPhone or iPad.

1. Tap the link → tap Add Shortcut

2.Next, open Settings.

3. Go to Privacy.

4.Tap Analytics & Improvements.

5.Tap Analytics Data.
6.Scroll up and tap the most recent log-aggregated file.

7.Now, here, tap the share icon at the top right.

8.Next, tap the View Battery Cycle shortcut in the Share Sheet.

A notification will appear on the top displaying the device’s cycle count. So, that’s a quick way of checking the battery cycle count with the shortcut.
Find your iPhone’s battery cycle count
These are two simple ways to check the iPhone batterycharge cycle count. Studying the battery cycle count and battery health helps better understand how the battery is performing and whether the charging style needs to be changed.
Share your opinions in the comments below of how helpful this method  is for you in determining the battery condition of your iPhone or iPad.

Does 5G use more battery on your smartphone?

Once a feature reserved for flagship smartphones, 5G has now become widely available across all price tiers. But hardware support is only one side of the equation — many carriers worldwide are still transitioning between 4G LTE and 5G. Keeping that in mind then, should you enable 5G on your smartphone ? And more importantly, does the feature drain your battery faster than previous gen cellular standards?

Does 5G use more battery than 4G LTE?

You’re not alone if you’ve noticed higher battery drain than usual while connected to a 5G network. Samsung, Apple, T-Mobile, and others have admitted that you should probably switch to 4G if you care about battery life. -intuitive, given that 5G was supposed to enable faster data transfer and reduce network activity. But there are actually a few good reasons behind this, starting with how carriers globally have upgraded to 5G infrastructure.
In a nutshell, carriers have two options when it comes to upgrading existing 4G infrastructure to support 5G technologies. The first kind, Non-Standalone 5G (5G NSA), involves using 5G for data transfer as you’d expect. routes calls and messages through legacy 4G or 3G networks. According to Samsung, this means that your smartphone is connected to two different networks at the same time, which increases power draw and battery drain. Standalone 5G (5G SA) deployments don’t suffer from the same limitation as it doesn’t rely on LTE.

Your smartphone may still need 4G for voice and text when connected to a 5G network, potentially increasing battery drain.
Unsurprisingly, the earliest adopters preferred 5G NSA since it’s cheaper to deploy. And you can’t blame carriers since the difference likely adds up at the scale of an entire country. Unfortunately, this is not something you can control, short of switching carriers anyway In the US, T-Mobile is currently leading the pack in terms of 5G SA coverage in the US. Before you switch though, keep in mind that there are also other 5G-related factors contributing to increased battery drain.

Take action: How to turn off 5G on your Android phone

As we learned from 3G and 4G many years ago, transitioning smartphone hardware from 4G to 5G wasn’t going to happen overnight.The first 5G smartphones used a discrete modem rather than one integrated directly into the SoC.This led to exceptionally high power draw across the board, not just on 5G networks. The situation has improved somewhat since then, with integrated modems now commonplace. Still, 5G connectivity remains slightly inefficient compared to 4G LTE.
Poor signal strength can dramatically affect your smartphone’s battery life
This problem only gets worse when you don’t have decent reception.If you’re far away from the nearest 5G tower, your phone’s modem has to work harder to establish a connection.In other words, expect higher power draw and lower battery life Check your carrier’s coverage map if available. Depending on where you live, 5G towers may be few and far in between — at least when compared to 3G and 4G LTE.

How much more battery does 5G consume compared to 4G?

To conclude, 5G battery drain depends on the type of network you’re connected to, your phone’s hardware, and cell reception. These factors change and evolve over time, making it difficult to pinpoint how much worse 5G is for battery life.
As a quick point of reference, though, early 5G smartphones lost one to two hours of battery life versus a standard 4G connection. The iPhone 12, the first in the series with 5G support, suffered from this problem. To remedy this, Apple now offers a Smart Data mode that automatically turns off 5G on the iPhone when you don’t need it.
When it comes to more recent devices like the Pixel 7 or any of the best 5G phones, you’ll likely notice a smaller difference in battery life. And as time goes on, you can expect the difference in battery drain between cellular generations to disappear entirely.

To conclude, 5G battery drain depends on the type of network you’re connected to, your phone’s hardware, and cell reception. These factors change and evolve over time, making it difficult to pinpoint how much worse 5G is for battery life.
As a quick point of reference, though, early 5G smartphones lost one to two hours of battery life versus a standard 4G connection. The iPhone 12, the first in the series with 5G support, suffered from this problem. To remedy this, Apple now offers a Smart Data mode that automatically turns off 5G on the iPhone when you don’t need it.
When it comes to more recent devices like the Pixel 7 or any of the best 5G phones, you’ll likely notice a smaller difference in battery life. And as time goes on , you can expect  the difference in battery drain between cellular generations to disappear entirely.

5G vs Wi-Fi: Does mobile data use more battery?

Yes, cellular technologies like 5G will always drain your battery faster than Wi-Fi.You see, the strength of a radio wave decreases exponentially as you move away from the base station.This is known as the inverse-square law.compensate for this fall-off, your phone needs to send out a more powerful signal.

When you connect to a Wi-Fi network, you’re much closer to the source of the signal. 5G signals, on the other hand, can originate from several hundred meters away, if not more. And while it does help that cell phone towers are usually much more powerful and larger than your typical home router, your phone still needs to emit a more powerful signal. This problem only gets worse the further you move away from the tower, so a stronger signal is always recommended.
Of course, your smartphone still remains connected to a cell tower even when you switch over to Wi-Fi. However, this link isn’t actively used for data transfer and is more or less kept idle until a voice call or SMS comes along.

In this article, I’ll show you how to fix an iPhone that won’t charge, step-by-step.
Know This Before You BeginOne of the most common questions Apple techs receive when an iPhone won’t charge is this: “If my iPhone won’t charge, do I need a new battery?”
In spite of what you’ll read on many websites, the answer to this question is no! There’s a lot of misinformation out there, and that was one of the main reasons I wanted to write this article.

The truth is that most of the time, it’s your iPhone’s software — not hardware — that’s preventing your iPhone from charging. If your iPhone won’t charge, 99% of the time, replacing the battery will have zero effect!

iPhone software decides when to charge your iPhoneAnd, if there is a hardware problem, it’s much more likely that the issue is with the charging port itself — but we’re not there yet.
Wireless Charging: A Temporary FixWhile you work on fixing your iPhone, you may still be able to charge it wirelessly. Every iPhone since the iPhone 8 supports wireless charging with Qi-certified chargers. Place your iPhone on the center of a Qi wireless charger and see if starts charging.
If it does — that’s great! However, we still need to address the problem preventing your iPhone from charging with a wired connection.
If your iPhone won’t charge wirelessly either, follow the step-by-step guide below, or check out our other article on how to fix wireless charging problems.
How To Fix An iPhone That Won’t Charge

1. Hard Reset Your iPhoneSometimes the solution is as simple as hard resetting your iPhone. That’s the first thing an Apple tech would do in the Apple Store, and it’s easy to do at home.

Here’s how:How can I tell whether my lightning cable is the reason why my iPhone won’t charge?

If there is no visible damage to the outside of the cable, try plugging your iPhone into a USB port on your computer to charge instead of using the wall adapter that came with your iPhone. If you already charge your iPhone using your computer, try using the wall adapter. If it works in one place and not the other, your cable isn’t the issue.
This might seem obvious, but sometimes the best way to determine whether you have a “bad cable” is to try charging your iPhone using a friend’s cable. If your iPhone suddenly springs back to life after you plug it in, you’ve identified the reason why your iPhone won’t charge — a faulty cable.

Don’t forget about your iPhone’s warranty!If your iPhone is still under warranty, the USB cable (and everything else in the iPhone box) is covered! Apple will replace your lightning cable for free, as long as it’s in decent shape.
You can set up a return on Apple’s support website or call your local Apple Store to make an appointment with the Genius Bar. If you decide to go to the Apple Store, it’s always a good idea to make an appointment at the Genius Bar before you go in. That way, you won’t have to wait in line — at least not for long.
3rd-party cables can charge iPhone charging problems One of the most   common reasons why an iPhone won’t charge comes from low-quality, third-party iPhone charging cables that people buy in gas stations. Yes, Apple cables are expensive, but in my experience, those $5 knockoffs never hold up like the real thing. There are good ones out there — you just have to know which ones to choose.
If you’re looking for a high-quality replacement iPhone charging cable that’s more durable than Apple’s, check out our favorites on Amazon. These aren’t cheap gas station cables that are going to break in a week. I love the 6-foot Lightning cable because it’s long enough for me to be able to use my iPhone in bed.
The important thing to look for is a Made For iPhone (MFi) label on the box. MFi is essentially Apple’s seal of approval — it’s an accessory that meets Apple’s software and hardware requirements.

3. Try A Different iPhone Charger Do you charge your iPhone by plugging it into the wall, using a car charger, in a speaker dock, in your laptop, or some other way? There are a lot of different ways to charge an iPhone.
Remember that it’s your iPhone software that says ‘Yes’ or ‘No’ to charging when your iPhone connects to an accessory. If the software detects power fluctuations, it will prevent your iPhone from charging as a protective measure.
How can I tell whether my charger is the reason why my iPhone won’t charge?We’ll do the same thing we did when we inspected your Lightning cable. The simplest way to find out whether your charger is bad is to try another one. Make sure you try more than one because chargers can be very finicky.
If your iPhone won’t charge with the wall adapter, try plugging it into a USB port on your computer. If it won’t charge in the computer, try plugging it into the wall — or try a different USB port on the computer. If your iPhone charges with one adapter and not the other, then your charger is the problem.
There are high-quality fast chargers out there, but you have to be carefulIf you need a new charger, check out the chargers we recommend using the same link as above (for the cable). The maximum Apple-approved amperage for iPhone chargers is 2.1 amps. Unlike many third-party chargers that can damage your iPhone, these ones will charge your iPhone quickly and safely.

(The iPad charger is 2.1A and Apple says it’s OK for iPhones.)
Tip: If you’re trying to charge using an Apple keyboard or USB hub, try plugging your iPhone directly into one of your computer’s USB ports. All the devices plugged into USB hubs (and keyboards) share a limited supply of power. I have personally seen iPhone charging problems occur because there wasn’t enough power to go around.

4. Brush The Gunk Out Of Your iPhone’s Charging PortUse a flashlight and take a close look at the charging port in the bottom of your iPhone. If you see any debris or gunk in there, it might be preventing the lightning cable from making a solid connection to your iPhone. There are lots of connectors down there (the lightning cable has 9), and if the wrong one is blocked off, your iPhone won’t charge at all.
If you find lint, gunk, or other debris in the charging port of your iPhone, it’s time to brush it out. You need something that won’t conduct an electric charge or damage the electronics in the bottom of your iPhone. Here’s the trick:Grab a toothbrush (one you’ve never used before) and gently brush out your iPhone’s charging port. When I was at Apple, we used fancy anti-static brushes to do this (which you can get on Amazon for next to nothing), but toothbrushes work just as well.
Dealing with liquid damage One of the most common reasons why an iPhone won’t charge is liquid damage. Liquid damage can short out the connections in the charging port of your iPhone cause all sorts of problems with your iPhone. Even if you’ve dried out the port and brushed out the gunk, sometimes the damage has already been done.

5. Repair Your iPhoneIf you go to an Apple Store to repair your iPhone and there has been liquid or physical damage to phone, the only option they can offer is to replace your entire iPhone. If you don’t have AppleCare+, this can get expensive, fast.
If you had pictures, videos, or other personal information on your iPhone and your iPhone won’t charge, Apple will say they’re gone forever. Get in touch with an Apple representative and see what they can do. If all they can do is replace your iPhone, you may want to consider visiting a local Apple Store to repair your iPhone  repair shop repair .
iPhone Charging Again!I hope your iPhone has sprung back to life and you’re on your way back to a full charge. I’d love to hear from you about your experiences fixing the iPhone charging problem, and I’m here to help along the way.

I’m going to tell you exactly why youriPhone battery drains so quickly and exactly how to fix it. I’ll explain how you can get longer battery life out of your iPhone without sacrificing functionality. 

1. Close Out Your AppsOnce every day or two, it’s a good idea to close out your apps. In a perfect world, you would never have to do this and most Apple employees will never say you should. But the world of iPhones is not perfect — if it were, you wouldn’t be reading this article.
How To Close Out Your AppsDouble-click the Home Button (iPhones without Face ID) or swipe up from the bottom to the center of the screen (iPhones with Face ID) to open the iPhone app switcher. The app switcher allows you to see all the apps that are stored in the memory of your iPhone. To browse through the list, swipe left or right with your finger. I bet you’ll be surprised by how many apps are open!

To close an app, use your finger to swipe up on the app and push it off the top of the screen. Now you’ve really closed the app and it can’t drain your battery in the background. Closing out your apps never deletes data or causes any negative side-effects — it can only help you get better battery life.2. Notifications: Only Use The Ones You NeedWe’ve all seen the question before when we open an app for the first time:

“App Would Like To Send You Push Notifications”, and we choose OK or Don’t Allow.  Few people realize how important it is to be careful about which apps you say OK to.
When you allow an app to send you Push Notifications, you’re giving that app permission to keep running in the background so that if something happens that you care about (like receiving a text message or your favorite team winning a game), that app can send you an alert to let you know.
Notifications are good, but they do drain battery life. We need to be notified when we receive text messages, but it’s important for us to choose which other apps are allowed to send us notifications.

How To Fix NotificationsGo to Settings -> Notifications and you’ll see a list of all your apps. Underneath the name of each app, you’ll see either Off or the kind of notifications that app is allowed to send you: Badges, Sounds, or Banners. Ignore the apps that say Off and take a look through the list. As you go, ask yourself this question: “Do I need to receive alerts from this app when it’s not open?”

If the answer is yes, leave everything as it is. It’s absolutely fine to allow some apps to notify you. If the answer is no, it’s a good idea to turn off notifications for that app.
To turn off notifications, tap the name of the app and turn off the switch next to Allow Notifications. There are other options in here too, but they don’t affect your iPhone’s battery life. It only matters if notifications are off or on.

2. Turn Off The Widgets You Don’t UseWidgets are little “mini-apps” that continually run in the background of your iPhone to give you easy access to up-to-date information from your favorite apps. Over time, you’ll save a significant amount of battery life by turning off the widgets you don’t use. If you never use them, it’s OK to turn them all off.
If your iPhone is running iOS 14 or newer, press and hold on a widget you want to remove, then tap Remove Widget -> Remove.
remove home screen widget on iphoneIf your iPhone is running iOS 13 or older, go to the Home screen swipe from left to right until you get to widgets. Then, scroll down and tap the circular Edit button to see a list of the widgets you can add or remove on your iPhone. To remove a widget, tap the red minus button to its left.

3. Turn Off Your Phone Once A Week (The Right Way)It’s a simple tip but important nonetheless: Turning your iPhone off and back on again once a week can resolve hidden battery-life issues that accumulate with time. Apple would never tell you that because in iPhone Utopia, it wouldn’t.
In the real world, powering off your iPhone can help resolve issues with apps that have crashed or other, more technical problems that can occur when any computer has been on for a long time.
How To Turn Off Your iPhone (The Right Way)To power off your iPhone, press and hold the power button until “slide to power off” appears. If your iPhone has Face ID, simultaneously press and hold the side button and either volume button.
Swipe the circular power icon across the screen with your finger and wait as your iPhone shuts down. It’s normal for the process to take several seconds. Next, turn your iPhone back on by pressing and holding the power or side button until you see the Apple logo appear.
4. Background App RefreshCertain apps on your iPhone are allowed to use your Wi-Fi or cellular data connection to download new content even when you’re not using them. You can save a significant amount of battery life (and some of your data plan) by limiting the number of apps that are allowed to use this feature that Apple calls Background App Refresh.
How To Fix Background App RefreshGo to Settings -> General -> Background App Refresh. At the top, you’ll see a toggle switch that turns off Background App Refresh entirely. I don’t recommend you do this, because Background App Refresh can be a good thing for certain apps. If you’re like me, you’ll be able to turn off almost every app on the list.
As you scroll through each app, ask yourself this question: “Do I want this app to be able to download new information even when I’m not using it?” If the answer is yes, leave Background App Refresh enabled. If not, turn it off and you’ll be saving more battery life each time you do.

5. You May Have A Hardware Problem (But It Might Not Be The Battery)In the beginning of this article, I mentioned that the vast majority of issues related to iPhone battery life come from software, and that’s absolutely true. There are a few instances where a hardware issue can cause problems, but in almost every case the problem isn’t with the battery.
Drops and spills can cause damage to internal components that are involved in charging or maintaining the charge on your iPhone. The battery itself is designed to be quite resilient, because if it were punctured it could quite literally explode.
The Apple Store Battery TestWhen you bring your iPhone to an Apple Store to be serviced, Apple techs run a quick diagnostic that reveals a fair amount of information about the overall health of your iPhone. One of these diagnostics is a battery test, and it’s pass/fail. In all my time at Apple, I believe I saw a total of two iPhones with batteries that did not pass that test — and I saw a lot of iPhones.

If your iPhone passes the battery test, and there’s a 99% chance it will, Apple will not replace your batteryeven if you’re under warranty. If you haven’t already taken the steps I’ve described in this article, they’ll send you home to do them. If you have done what I’ve suggested, you can say, “I tried that already, and it didn’t work.”
In ConclusionI sincerely hope that you have enjoyed reading and learned from this article. Writing it has been a labor of love, and I’m grateful for each person that reads it and passes it on to their friends. If you’d like to, leave a comment below — I’d love to hear from you.

If there’s one thing we know about the desires of smartphone buyers the world over, it’s that we always want more battery power. No matter how high of a capacity batteries have, it seems like they could always have more To be fair, battery capacity is definitely increasing; just not at a fast enough rate. But that could change soon because of a team of Norwegian nanoscientists who successfully devised a method that could potentially increase smartphone battery capacity by a factor of five, via Business Insider.

A Norwegian team of nanoscientists has devised a method of creating hybrid silicon batteries.The team claims that its batteries could be three-to-five times as powerful as current lithium-ion batteries.Industrial testing of the hybrid silicon batteries will begin soon.
Those of you who are knowledgeable about how batteries work will probably scoff and say that we already know that silicon will make better batteries than the graphite-based batteries we enjoy today. 400 percent as it functions within the battery’s construction.

The Norwegian team, however, has figured out a new way to create an ideal combo of graphite and silicon that will make batteries last much longer without high-speed degradation. This would not only help smartphone batteries have a higher potential capacity, but also electric vehicle batteries, laptop batteries, and any other product that has a rechargeable power source.
A company called Kjeller Innovation is already hard at work to commercialize the technology, calling the project Silicon X. It is already in talks with various partners to begin testing the hybrid silicon batteries in industrial processes.
However, Kjeller Innovation is not the only company trying to optimize lithium-ion batteries. While this is the first time we’ve heard of a successful implementation of significant amounts of silicon in batteries, it may be some other form of design that ends up powering our future electronics. But one thing is for sure: whichever company does dramatically increase battery capacity and successfully commercializes the technology is sure to pull in billions.

Silicon Battery Technology GoodSilicon batteries are lithium-ion batteries tricked out with silicon to replace graphite. Graphite has long been the go-to material for lithium-ion batteries, but silicon offers the allure of longer life and faster charging times along with lower costs, compared to conventional Lithium-ion batteries.
The US Army, for one, is silicon-curious. It has been scouting new silicon battery technology on account of the potential for a significant savings on weight, which is an important considerations for soldiers who are loaded with an increasing amount of electronic gear.

Weight savings is also a consideration for the electric vehicle makers. BMW and General Motors are among the list of automakers staking a claim to silicon-based energy storage.
There being no such thing as a free lunch,c have had to overcome some significant challenges. In a 2017 state-of-play report the US Department of Energy described the main culprit, which involves the instability of the solid electrolyte interphase ( SEI).
“The SEI is a film that forms on the anode active particles that inhibits or stops further reactions between the extremely low voltage lithiated anode and the electrolyte,” the Energy Department explained. “Without this film, or with a film that is not sufficiently passivating (as in silicon), these reactions proceed continuously, consuming Li [lithium] and leading to rapid capacity fade and short cell life.”
Weight savings is also a consideration for the electric vehicle makers. BMW and General Motors are among the list of automakers staking a claim to silicon-based energy storage.

There being no such thing as a free lunch, silicon battery researchers have had to overcome some significant challenges. In a 2017 state-of-play report the US Department of Energy described the main culprit, which involves the instability of the solid electrolyte interphase ( SEI).
“The SEI is a film that forms on the anode active particles that inhibits or stops further reactions between the extremely low voltage lithiated anode and the electrolyte,” the Energy Department explained. “Without this film, or with a film that is not sufficiently passivating (as in silicon), these reactions proceed continuously, consuming Li [lithium] and leading to rapid capacity fade and short cell life.”
NEO also adds that its technology “significantly improves the life span and cycling stability compared to conventional metallurgical silicon-based particles.” 

ode materials at “semi-commercial scale.”Meanwhile, the newly announced agreement with the yet-to-be-named university is aimed at achieving additional performance improvements by pairing NEO’s silicon anodes with the mystery school’s advanced polymer electrolyte.
NEO also points out that polymer electrolytes are non-flammable, providing for safety improvements.
Though apparently there is more work to be done, NEO is cautiously optimistic. “NEO and the Developer acknowledge that creative, yet fast-paced R&D and collaboration must occur to scale both Parties’ technologies into commercial-level products and outputs,” the company stated in its announcement.

Board member Dr. Jinhyuk Lee, for example, holds degrees from MIT and UC-Berkeley among many (many, many) career achievements. He is currently an assistant professor at McGill University.
Following the trail of academic connections, we see that the Balsara lab at UC-Berkeley specializes in polymer electrolytes.
Based on our patents, group alumni have cofounded two battery start-up companies: Seeo (founded in 2007) and Blue Current (founded in 2014),” the lab states on its website.

Blue Current is new to the CleanTechnica radar, so we have some catching up to do. “The company manufactures 100% dry, safe and high performance silicon elastic composite solid-state batteries to power the new energy economy including electric vehicles, grid storage and consumer electronics,” the company states on its website.
The plot thickens when you consider that Blue Current is partners in the Energy Department’s energy storage research hub JCESR, which is short for Joint Center for Energy Storage Research. The consortium launched in 2012 during the Obama administration with Argonne National Laboratory at the helm. 2017 recap, JCESR highlighted three startups that leveraged JCESR energy storage properties, including Blue Current as well as the polymer membrane specialist Sepion and the long duration energy storage company Form Energy, which is setting up a new factory in West Virginia.

Many Roads To The Silicon Battery Of The Future

Still more thickening of the plot occurred last December 22, when Businesswire distributed a press release that apparently speaks for JCESR, Argonne, and Blue Current all at once. The release credits JCESR for enabling Blue Current to “develop a safe, solid-state battery that is ready for megawatt-scale manufacturing.”

The press release notes that Blue Current’s composite electrolyte eliminates the need for metal plates and bolts, and that the target market is electric vehicles.
“As part of rigorous safety testing, the company subjected its cells to harsh conditions that electric vehicles could encounter in the real world. Thermal runaway — an overheating event that can lead to fires — never occurred,” the release emphasizes.

You’ve no doubt seen or read many articles online about saving battery life.It’s a popular topic because nobody likes tethering a phone to the wall multiple times a day.However, most battery-saving articles give you ideas about what to try in order to improve your battery life. This time around,

we’re instead going to identify all of the various things that cause drain battery.

Charging habits to maximize battery life

Battery size

On the high end, phones like the Samsung Galaxy S22 Ultra and the Moto G Power have massive 5,000mAh cells while some other phones, like the regular Galaxy S22’s 3,590mAh battery, have smaller cells. Generally speaking, phones with larger batteries tend to have better battery life than ones with smaller batteries.
This one is a matter of simple math. The larger the cell, the more power the phone carries around. Of course, there are many other factors to take into account. However, if the phones have identical specs, the one with the bigger battery will simply last longer.

There are four different ways a display can affect battery life. The first is the size, as larger screens have more surface area and require more power to light up. Phones with larger displays also usually have larger batteries so there is a bit of a give and take there.
The second way a phone’s display affects battery life is the resolution. Admittedly, the differences aren’t huge, but it is objectively measurable. Displays with 1440p resolution have 77% more pixels than a 1080p display and it requires extra processing power (and therefore OEMs sometimes include a 1080p mode on a 1440p display to help cut back on the processing power and save battery.
Displays use more battery than any other phone component without question.
Brightness is another significant power draw. This is also a matter of simple math. The brighter something is, the more power it requires. It’s not as noticeable if you go from 50% to 40% brightness. , though.

Finally, the display’s refresh rate matters a lot. The refresh rate represents the number of times a screen refreshes every second and is measured in hertz (Hz). Newer phones have 90Hz and 120Hz displays which refresh 50%-100% more frequently than regular 60Hz displays. That requires a whole bunch of extra processing power and put further strain on your phone’s battery. Modern phones have adaptive refresh rates to help combat the battery drain, but it’s still higher than if you set it at 60Hz.
Connections
Connections have a massive impact on battery life . The most common connections are your cell phone signal, data, Bluetooth, Wi-Fi, and location services. Connections drain the battery in a few different ways and the first one is fairly obvious.Connections have a massive impact on battery life. The most common connections are your cell phone signal, data, Bluetooth, Wi-Fi, and location services. Connections drain the battery in a few different ways and the first one is fairly obvious.
Every time your phone connects to something, it costs you battery life.
Finally, actually using these connections drains your battery. If you go online and spend five minutes downloading a file, that’s five whole minutes your phone is actively using its networking hardware. The same is true of voice calls as your phone engages its radio for the entire length of the call.

A lot of people recommend using airplane mode to switch off all connections when not using your phone. To be honest, it doesn’t save that much battery and it ends up being invasive and annoying. We recommend staying connected to Wi-Fi while at home (or work). Additionally, the Google Play Store, Google Photos, Amazon Photos, and others all have settings that will postpone backups or updates until you’re connected to a charger. You should definitely check and see what can be put off until your phone is safely charged.
Aside from that, just be mindful of how your connections are operating and use some common sense. Don’t start downloading a new 5GB game from the Play Store when your phone is at 12% battery and you should be okay.

Chipset
The chipset matters more than probably anything else here (aside from display) because it basically runs the whole phone.There are many ways a chipset can impact the battery.It’s especially true for root users as they have access to CPU tweaking tools.That said , even some non-root phones have performance modes that will drink your battery like water in the desert.An upgraded chipset is a lot more important than a lot of people realize.The model of the chipset matters as well. The Pixel 3a XL was one of the big surprises in terms of battery life in 2019. Part of that was due to the Snapdragon 670, a less powerful chip tuned for battery life rather than performance unlike the Snapdragon 855. On the other end of the scale, the Snapdragon 855 Plus is an overclocked version of the regular 855 and it uses more power.
Chipset updates get frequently overlooked when talking about new smartphones because a lot of people only look at raw performance. However, the efficiency, size, and heat improvements are arguably more important than raw performance boosts these days.

camera

People who use the camera excessively often have below average battery life.Video is more battery intensive.The processor has to take anywhere between 30 and 60 photos per second depending on the frame rate of the video and it also has to eventually stitch all of them matters together.Of course, resolution here as well.For obvious reasons, 4K video requires more power to process than 720p video.
Shutterbugs drain their batteries a lot more quickly than people who don’t use their cameras very often. 
Leaving your phone in a hot car or using it while charging is really not good for your long term battery life.Temperature is a bit more tricky. Cold batteries have lower capacities (remember, we’re dealing with chemicals here) while warmer batteries offer better performance. However, too much time spent at extreme temperatures can cause permanent degradation of the battery over time. states that modern lithium batteries perform most optimally at about 68F. However, most people can’t temperature control their entire life so this problem is more or less unavoidable. The good news, though, is that OEMs have optimized charging and fast charging to an extent where users have few opportunities to really mess things up.

You can use some tricks to help prevent excess degradation from heat and age. However, even with best practices, the general rule of thumb is that you lose roughly 20% of your battery’s capacity after about 1,000 charges. You can avoid excess degradation by not using your phone while it charges, charging it less often (select phones with super long battery life rather than super-fast charging), and don’t play heavy games that heat up your phone for excessively long periods 
the best way to save battery isn’t to adhere to an ancient list of outdated tricks that don’t work well enough if they even work at all. It’s also a bad idea to take advice that completely changes how you enjoy using your phone.

The best way to save battery is to understand where your drain comes from so you can adjust your daily use accordingly.Hopefully, with the help of this guide, you can do just that and score some outstanding battery life like I do.Good luck.

At Back Market, our refurbished devices are as good as new. Actually, they’re better because reborn electronics have a much lower environmental footprint. We know that you may have questions when making the switch from buying new to buying refurbished. address the battery life of refurbished devices.

  If you’ve already purchased a device from us, don’t forget you can reach out to Back Market Customer Care at any time. If you can’t find what you’re looking for in our FAQs, you can reach them by logging in to your Back Market account and going to “My orders” > “Ask for help”.

What battery performance can I expect over my phone’s lifetime?

Every device sold on Back Market is required to have a battery with at least 85% of its original capacity. If your device does not reach at least 85% of its initial charge capacity when you receive it, reach out to Back Market Customer Care ( we will contact the seller and they will replace the battery or device for you.)
Good to know: If you purchased a smartphone with a brand-new battery, your device must have a charging capacity of 100% when you receive it. If the battery capacity falls below 90% after the first 30 days of use and during the first 12 months of use, you are entitled to a repair.

All batteries degrade over time, and this degradation is measured in two ways: State of Health (SOH) percentage and cycle counts. 
SOH is the available battery capacity compared to the original battery’s specs. 
“Cycle counts” refers to how many times the phone’s battery has used 100% of its capacity and then is fully recharged again. Because of this, the battery life on older devices will start to drain faster throughout the life of the device.

So, where did the battery requirements for charge cycles and battery SOH come from? Simple, most manufacturers agree that anything under 80% SOH is considered “consumed” and ready to be replaced. Batteries under 80% tend not to last throughout a full day , and if you try to do any power-intensive tasks, like watching a movie on the Netflix app, your phone may actually shut down.

Since we don’t want to sell you a phone that won’t hold enough charge to get you through the day, we require sellers to only use batteries above 85% during the withdrawal period. As for cycle counts, 500 tends to be the industry standard as well for what is considered a “good” battery. While there is no direct correlation between charge cycles and battery SOH (meaning x number of cycles does not degrade the SOH by x%), high cycle counts are a solid indicator of a bad battery.
Because of this, it’s inevitable that your battery’s health will eventually fall below 80% of its initial charge capacity with normal use.

My battery doesn’t last long

The best way to prevent your battery from draining is to be mindful of how you use your device. Certain apps, such as games, video streaming, or social media can demand a lot from your battery. at once, like IG, Fortnite, Netflix, etc., the battery will drain quicker than you’re expecting. Find more tips for improving your battery life
Whatever the grade of your device, each battery is checked and tested by experts to ensure it has at least 85% capacity. If you receive your device and aren’t getting the battery life you expected, you can check your battery by following these steps :
iphone Go to “Settings” > “Battery” > “Battery Health”
AndroidAlthough the wording of some of these options may differ, this should point you in the right direction for any Android device: Go to “Settings” > “Battery” > “Battery Usage”

Additionally, 3rd party apps like AccuBattery can help you track the lifetime health of your battery.
Samsung  Open the “Samsung Members” app and go to: “Get Help” > “Interactive checks” > “Battery”
When you begin to use your device, synchronizing your data requires a lot of resources and can use up the battery life of your smartphone. Don’t panic, this is normal. Charging may take a bit longer than normal, and it may discharge quickly , but once your phone is completely up and running, the battery discharge rate should return to normal.

My device isn’t charging
If your device isn’t charging, be sure to check the charging cable, AC adapter, and outlet to make sure all these accessories are working. different AC adapter or plug it into a different outlet to see if that fixes the issue. If you’re still not seeing a charge, swap out the charging cable as well.
If you’ve tried a different charging cable, AC adapter, and outlet — and still can’t get the device to charge, contact Back Market Customer Care for help.

The battery is warm or inflated
Excessive heat from your batter an inflated battery are indicators that the battery is not functioning correctly. If you’re experiencing this issue, remove the device from the charger, turn off the device to ensure it’s no longer draining the battery, and contact us for a replacement or repair.
Keep in mind that charging a device generates heat and if you’re using the device while it’s charging you’re only adding to that heat. It’s normal for phones to get warm — the time to be worried is if it’s actually hot to the touch , as in uncomfortable to hold.

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what can you do if your iPhone battery is draining too fast?We’ve got a monster list of tips here for you to try out.

If your iPhone battery is draining too fast, the quick fix is ​​to put it on Low Power Mode until you can get to a charger. However, it’s worth looking at individual reasons to see if you can reduce the chance of it happening often. what we’ll look at below.

Let’s take a look at you can try to keep your battery going for as long as possible. iPhone battery life during daily use

Turn on Low Power Mode

Low Power Mode is obviously the quick, easy win in this situation. When you turn on Low Power Mode, your iPhone notifies you when the battery level drops to 20%, and it will give you another reminder at 10%. You can turn on Low Power Mode with one tap.

Low Power Mode reduces display brightness, optimizes device performance, and minimizes system animations. Apps, including Mail, will not download content in the background, and features like AirDrop, iCloud sync, and Continuity will be disabled.

Although this would appear to be the one easy solution to extend your iPhone battery life, you really should investigate the battery draining issues at a deeper level to see why it’s happening. Low Power Mode should never be used all the time, as it’s actually bad for the battery in the long term. It’s only meant to be a temporary stop-gap solution until you can get to a charger.

Check the Battery page to see which apps are draining the battery

The first thing you should do to figure out why your battery is draining so fast is to go to the Battery section in Settings.This will give you battery stats, such as which apps are using the most battery.These stats cover the last 24 hours , but you can also get that information for the previous 10 days if you want to get a broader overview.

By finding out which apps are sucking the battery dry, you can avoid using them until you get to a charger. Alternatively, if they take an unacceptable amount of charge away, you should consider uninstalling them, as they may be defective.

Enable Airplane Mode

Another quick-win, similar to Low Power Mode. Putting the phone into Airplane Mode will, more or less, shut the phone’s functions down and put it into a state of hibernation. You can enable Airplane Mode by swiping down from the top-right corner of the screen, opening Control Center, and tapping the airplane icon.

Airplane Mode does render your phone kind of useless since nothing works anymore. good short-term temporary solution.

If you don’t absolutely need Bluetooth at any given moment, it’s better to disable it. Just open Control Center and tap the Bluetooth icon at the top-left of the screen.

Turn off background processes such as notifications

Notifications are another thing that can draw battery power. So you need to disable as many notifications as possible and only stick to the most important ones. That doesn’t include Facebook and Instagram, by the way.

Disable Location Services

This is probably the biggest battery drain of all. Every time an app connects to the phone’s GPS, and starts tracking your location everywhere, that’s when the battery percentage starts to drop like a rock. In the short term, you can disable Location Services entirely by going to Settings–>Privacy & Security–>Location Services and toggle it off.

In the long term, however, you need to seriously review your Location Services settings and disable all non-essentials — which is more than you may think.

Keep the iPhone display brightness as low as possible

A bright screen may look great, but that energy has to come from somewhere, and it’s not magic. To maximize your battery power, you must keep your screen brightness as low as possible.

 Obviously, don’t lower it so much that you’re struggling to make out anything on the screen. But if it’s so bright that you need sunglasses to read the screen, then you know it can be taken down a notch or five.

On that note, consider using Dark Mode as much as possible, although this isn’t a magic bullet for extending the battery’s lifespan. The iPhone has a Dark Mode, which you can switch on by going to Settings–>Display & Brightness. can have permanent Dark Mode or Automatic. Automatic is when the phone switches to Dark Mode when it senses it’s getting late in the day.

Stop playing high-performance games

Again, if your battery level is dropping, and it’s going to be a while before you’re home to your charger, it’s best to avoid playing any high-performance, battery-intensive games. , Apple Arcade has a lot of addictive ones which won’t drain the battery so fast. That requires a monthly subscription, though. But at $5 a month, it’s not a bank account-busting proposition. iMessage also has basic games.

Turn off the data plan and use wi-fi — but only when you need it

If you desperately need to hold onto your remaining battery juice till you’re back with your charger, it’s best to disable your data plan. Of course, this will temporarily turn your smartphone into a dumbphone, but if you need to jump online quickly, then a public wi-fi hotspot at Starbucks will surely scratch that itch. But also try to keep the wi-fi off if you don’t need it.

Never charge above 80% or let it drop below 20%

Known as the 80/20 rule, to maximize the battery’s lifespan, you should avoid charging above 80% and letting it drop below 20%. Obviously, there will be times when it is unavoidable when the battery completely drains. Plus, you shouldn’ t freak out if you charge it to 100%. But there are only a certain number of times you can fully charge the battery and let it fully drain without the battery degrading.

Apple has addressed this issue with a feature called Optimized Battery Charging. You can enable it by going to Settings–>Battery–>Battery Health. As it says on the screen, it learns from your daily charging routine to stop charging past 80%.

Don’t turn your phone screen on and off so much

This seems like a silly flippant suggestion, but every time you turn the iPhone display on and off, the lit display draws on the battery. You should also disable Raise to Wake in the Display & Brightness section in Settings. the phone will wake up every time you lift the phone up, which is ridiculous.

After all these tips, you may still find that your battery levels are suffering. This is where you have to seriously consider the possibility that the battery itself is on its last legs.

You can quickly check its status by going to Settings–>Battery–>Battery Health, and looking at the Maximum Capacity. This is the maximum amount of the battery that can be charged. Generally, after two years, you’re looking at around 80%, which is normal. But once it starts getting to around 50%, then you have to start asking yourself about the future of your device.

you can ask an Apple Store to replace the battery for you, or you can opt to replace it yourself if you have the technical know-how. Be aware, though, that if you try to do it yourself — and mess it up — then your warranty (if you had one) will be down the toilet. You may ultimately decide that replacing the battery isn’t worth the hassle or expense, and perhaps upgrading to a new phone is preferable instead.

In 2017, Apple revealed it slows down older iPhones such as the iPhone 6, iPhone 6S, iPhone 7, and the first generation iPhone SE in order to prevent unexpected shut downs by managing the performance peaks.

The performance management feature – or throttling as some have described it in the past – is also included on the iPhone 8, 8 Plus, iPhone X, iPhone XS, iPhone XS Max and iPhone XR, but it only kicks in after an unexpected shutdown first occurs on a device with a battery that has diminished ability to deliver maximum instantaneous power.
Apple iPhones from the iPhone 6 and later also have a Battery Health tool that was introduced with iOS 11.3 back in March 2018, along with the ability to turn off the iPhone’s battery management feature. Here is everything you need to know about Apple iPhone’s Battery Health and performance management features and how to control them.

What is the iPhone performance management feature?

Apple’s performance management feature is specific to iPhones and it’s designed to prevent a device from unexpectedly shutting down so the device can still be used. Unexpected shutdowns can occur for a number of reasons, be that extreme cold temperatures, or a device with a battery of high chemical age, for example.
Apple’s iOS software will dynamically manage performance peaks in order to manage shutdowns. It looks at a combination of things, like device temperature, battery state of charge and battery impedance. The software then assesses whether action is required and if it is, the maximum performance of some of the system components, like the GPU and CPU, will be managed in order to balance out workloads and allow for a smoother performance overall.
Some of the things you might notice when the performance feature has kicked in are: Longer app launch times, lower frame rates when scrolling, backlight dimming, lower speaker volume, gradual frame-rate reduction in some apps, disabled camera flash in extreme cases and apps refreshing in the background may require reloading upon launch.

Some of the things that won’t be impacted by the performance feature are: Mobile call quality and networking performance, captured photo and video quality, GPS performance, location accuracy, sensors like gyroscope, accelerometer, barometer and Apple Pay. 
With regards to the performance management feature, Apple describes it as: “If the battery health is able to support the observed peak power requirements, the amount of performance management will be lowered. If an unexpected shutdown occurs again, then performance management will increase. This assessment is ongoing, allowing more adaptive performance management.”
What is the Battery Health feature? Apple iPhones running iOS 11.3 and later have a Battery Health tool built in. To access the tool, go to Settings > Battery > Battery Health. From there, you’ll see information about your iPhone’s maximum capacity and peak performance capability. 

You’ll also see if your iPhone is being slowed by Apple’s performance management feature.
For example, we have an older iPhone XR showing as having a 94 percent battery capacity. Apple is not yet throttling the phone though: “Your battery is currently supporting normal peak performance”.
In the Battery Health feature, you’ll also see whether your iPhone needs service and you can subsequently turn off the controversial performance management feature that’s throttling your iPhone if you want to.
How to disable throttling on an iPhoneThe ability to disable – and even enable – throttling is only available for iPhones more than a year old running iOS 11.3 and later.
Under Battery in the Settings app you’ll notice the Battery Health option. Tap it. You’ll then see a screen with a link to more information about lithium ion batteries. Below that, you’ll see your battery’s maximum capacity.

If this indicator is under 80 per cent, you’ll see another message at the bottom of the screen that warns your iPhone’s battery is “significantly degraded”. There will be another link that will point you to a page about how to get your phone serviced. 
Disable ‘performance management’ featureIf your device has shutdown due to battery degradation, this same screen will tell you that “performance management has been applied to prevent this from happening again”.
There will also be an option to disable the throttling. You can’t enable the performance management feature until you experience another shutdown. Your iPhone will auto-enable it should that ever happen.

It’s also worth noting that “all iPhone models include fundamental performance management to ensure that the battery and overall system operates as designed and internal components are protected. This includes behavior in hot or cold temperatures, as well as internal voltage management. This type of performance management is required for safety and expected function , and cannot be turned off”. 
What do those percentages mean?In the Battery Health menu, you’ll see a percentage that indicates your iPhone battery’s maximum capacity, followed by a message explaining your iPhone battery’s peak performance capability.
For instances:
100 percent: Your battery is currently supporting normal peak performance.95 percent: This iPhone has experienced an unexpected shutdown because the battery was unable to deliver the necessary peak power.

Performance management has been applied to help prevent this from happening again. Disable…79 percent or less: Your battery’s health is significantly degraded. An Apple Authorized Service Provider can replace the battery to restore full performance and capacity. More about service options…Unknown: This iPhone is unable to determine battery health. An Apple Authorized Service Provider can service the battery. More about service options…Maximum capacity and peak performanceMaximum battery capacity measures your iPhone’s battery capacity relative to when it was new.

Batteries will start at 100 per cent when first activated and will have a lower capacity as the battery ages. According to Apple, a normal battery is designed to retain up to 80 per cent of its original capacity at 500 complete charge cycles when operating under normal conditions.
Now, as far as peak performance capability goes, it is the ability of your iPhone’s battery to supply adequate charge. If your iPhone’s battery maximum capacity is under 80 per cent, then its health has been significantly degraded and it needs replacing.