Based on common specifications related to USB power sources, such as the ports found on computers, the standard voltage supplied is typically 5 volts.
Understanding Standard USB Port Power Output
According to the provided information regarding power output from computer USB ports, these ports consistently supply 5V of electricity. This voltage is a fundamental standard for many USB power applications.
Along with this 5V voltage, the power delivery capability is defined by the maximum current. Most computer USB ports provide a maximum current of 0.5A. Combining the voltage and standard current gives a power output of 2.5 Watts (calculated as Voltage Current = 5V 0.5A = 2.5W) at best under these standard conditions. Later USB designs improved upon this by increasing the maximum current capacity up to 0.9A, allowing for slightly higher power delivery from the port while maintaining the 5V voltage.
Key Power Specifications (from reference)
Here are the key power specifications derived from common computer USB ports:
- Voltage: 5V
- Standard Maximum Current (Most Computers): 0.5A
- Maximum Power Output (Standard): 2.5 Watts
- Higher Maximum Current (Later USB Designs): 0.9A
This 5V level is a foundational aspect of USB power specifications, evident even in the output from standard computer ports.
