Power USB ports, maximum current USB ports
USB was invented to connect various devices to the computer and exchange information. Also, you can connect various devices, a computer mouse, keyboard, flash drives, hard drives to USB.
USB 2.0 0.5A explanation
- USB – port type
- 2.0 – USB port version, the most common USB 2.0 and USB 3.0, now a modification of USB 3.1
- 0.5A – the maximum current that the USB port can give out.
What can be connected to a 0.5A USB port
You can connect low-power devices, computer mice, keyboards, flash drives to the USB 0.5A port. Power consumption up to 2.5 watts.
What can be connected to a 1A USB port
You can optionally connect low-power hard drives to USB ports with maximum current; in some hard drives, there can be two USB connectors. In this case, one for power and information transfer the second only for power. These ports can connect devices with a power consumption of up to 5 watts.
What can be connected to a 2A USB port
In some devices, there are such ports, you can connect any device to them, but you can also connect devices that require more power, with a power consumption of up to 10 watts. External hard drives, etc.