What are the voltage and wattage of the USB 3.0 port on the computer?

The voltage of the USB 3.0 port is 5V. The power output depends on the current. The maximum output current does not exceed 900mA, so the maximum power is approximately 4.5W.

The detailed explanation is as follows:

• Voltage: The power supply voltage of USB 3.0 is the same as that of earlier versions of USB, both being 5V. This is to ensure compatibility between different versions of USB interfaces.
• Current and Power: The output current of USB 3.0 is limited. It usually does not exceed 900mA. Therefore, the maximum power is approximately 4.5W. However, the specific power may vary depending on different devices and application scenarios.

It should be noted that although USB 3.0 theoretically supports higher data transmission rates, the voltage and power limitations still exist. For some high-power devices, additional power supply may be required to ensure normal operation. When choosing to charge or connect devices using the USB interface, make sure that the voltage and power requirements of the device match the specifications of the USB interface to avoid damaging the device.