Drawing power from a USB connection. Launched in 2007, USB Battery Charging was the first USB power specification. Battery Charging was fixed at 7.5 watts, 5 volts and 1.5 amps. See
USB Battery Charging and
poweredUSB.
USB Power Delivery (USB PD)
In 2012, USB Power Delivery was introduced by the USB Implementer's Forum (USB-IF). USB PD enables charger and receiver to negotiate the required power, which increased from 7.5 to 240 watts by 2021. See also
poweredUSB.
Power Delivery Over USB-C Cables
Watts Volts Amps
15 5 3
100 20 5
240 5 5
PD Battery Logos
These logos indicate that the USB port supports Power Delivery. The numbers are the SuperSpeed version (see
USB).