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Is the charging speed related to the length of the cable?

 USB is the power source for digital devices. For devices with built-in batteries, connect the data cable to the USB-AC adapter or move the battery to ensure power supply. Many devices such as smartphones and smart watches are connected once a day, so it is important whether the charging speed varies depending on the length of the cable.

USB charging speed may vary depending on cable length

In short, the charging speed of USB will vary depending on the length of the cable. This is because the cable made of metal has internal resistance. If the value is large, the voltage will drop and current will be difficult to flow. Longer cables tend to have lower voltages because the resistance is proportional to the length of the cable. The thickness of the cable is also important. Since the resistance value is inversely proportional to the thickness of the cable, the thicker it is, the more it can prevent voltage drop.

USB power supply (VBUS) is sometimes defined as 5V±0.25 by the standard. If the voltage drops beyond this range, the operation may become unstable, so it cannot be ignored. In other words, assuming all other factors are the same, a shorter cable has a better charging speed. Different from life, for USB cable charging, “thick and short” is better than “thin and long”. However, in addition to the length/thickness of the cable, there are several factors that affect the voltage/current, such as the contact resistance of the connector. No wonder there are reports that there are more than a few percent difference when measuring power loss between high-quality USB cables and non-quality USB cables.

If you want to shorten the charging time as much as possible, reduce loss, and improve efficiency, use a commercially available USB current/voltage detector to find a good wire, or use a reliable manufacturer/brand of high-quality wire, let’s choose. Because it is used every day, if you calculate it 365 days a year in ○, it may turn out that high-quality, high-performance USB cables are more profitable, even though they are expensive.

>>>>>>>>>>Power Adapter

So whether the charging speed has something to do with the length of the cable. What do you think? Thank you for reading and hope it will help you!

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Can this device prevent USB network attacks? is that true?

We all know that malicious USB drives pose a major security threat to consumers and organizations

Although USB devices (such as flash drives) are convenient and make it easier to move data between devices, they can also be abused by cybercriminals to infect computers with malware and other viruses.

This is why a group of scientists and professors from Liverpool Hope University in the United Kingdom have created a sophisticated new device that can deal with the threat posed by malicious USB devices.

The project, led by Dr. Shishir Kumar Shandilya and Professor Atulya Nagar, aims to eliminate one of the most common paths through which attackers and cybercriminals can inject malicious files and programs.

Dr. Shandilya provided information on how to interact with flash drives. One of the main issues is that the computer has a better understanding of the operating system. The operating system usually treats it as a “trusted component”. He said: “If the operating system is not configured to limit and Elevate the user’s authority to the inserted USB device, then as long as the USB drive is inserted, it can execute the default auto-run script, which can transfer the expected payload to the computing device and transfer multiple types of viruses, Trojan horses, and keyloggers , Spyware, remote access Trojan (RAT) and other malicious programs are transmitted to computing devices.”

Intermediate equipment
For this reason, Dr. Shandilya and Professor Nagar came up with the idea of ​​using a new type of “intermediate” device, which is located between a flash drive and a USB port on a laptop or computer.

This intermediary device acts as a gateway or barrier, capable of scanning USB drives for malware, which may prevent the cyber attack before it starts.

According to Dr. Shadilya, the team’s new invention protects the host computing device by providing an additional layer of hardware security that can also hide the host’s operating system information. This is achieved by providing disguised information about the computer to an external device. However, intermediary devices also have methods to identify malicious software, and can grant USB devices full access, partial access, or complete block permissions.

The team’s new device is part of an emerging field of cybersecurity research called Nature Inspired Cybersecurity (NICS). This new field combines natural ideas and phenomena to ensure that the operating system does not fall prey to predators and can withstand attacks.

Dr. Shadilya and the team are currently getting in touch with the manufacturer to bring the device to the market, even though they already have a fully functional prototype.

》 》 》 》 》 》 》 》 》Laptop’s battery

What do you guys think? Let us look forward to its arrival! Thank you for reading

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