USB ports vary in compatibility, power output, data transfer speeds, and many other features. To differentiate between USB port formats, manufacturers often use color coding. For example, red USB ports typically represent USB 3.1 Gen 2 and USB 3.2 standards, while blue ports represent USB 3.0.
Black USB ports usually refer to USB 2.0 technology
So what does the ever-popular black USB port refer to? Basically, black USB ports are usually associated with USB 2.0, which was introduced in 2000 as an upgrade from the older white USB 1.x ports. Black USB ports, also known as “Hi-Speed” connectors, offer data transfer speeds of up to 480 Mbps.
USB ports are very popular despite being old.
Although black USB 2.0 ports are slower than the latest USB 3.x ports, they are still widely used on many modern laptops and PCs. This is because they are better able to handle peripherals such as keyboards, mice, cameras, printers, and older hardware. Black USB ports are also found on TVs to allow connection to external storage devices and media players.
In terms of power output, USB 2.0 ports provide a maximum current of 0.5A, which is enough to power small devices like the Fire TV Stick, but not enough for high-power devices like modern smartphones or tablets. If given the choice, users should prioritize using USB 3.0 or higher ports for charging devices or transferring large files.
It should be noted that USB port colors do not follow a common standard, so manufacturers may use different colors regardless of the port's capabilities. Therefore, users should consult the product manual to confirm the exact USB port specifications on their device.
Source: https://thanhnien.vn/tai-sao-mot-so-cong-usb-co-mau-den-185250302215837378.htm
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