What is the power output of USB 3.0 and USB 4.0?

USB 3.0 specifications allow for a maximum power output of 900 milliamps, which translates to 0.9 amps. This increased power supply capability compared to previous USB versions was designed to support more power-hungry devices, enabling quicker charging and operation of devices that demand greater energy input.

In terms of USB 4.0, it continues to support this higher power output due to its backward compatibility with USB Power Delivery (USB PD), which can deliver much more power under the right conditions, but the base standard for USB 4.0 closely aligns with the power capabilities established by USB 3.0.

This choice reflects the technological advancements aimed at enhancing efficiency and usability for a wide range of devices, making it the correct answer.