Also found in: Medical.
USB powerThe USB-IF has defined power ratings with each USB version as well as a separate Battery Charging specification for power adapters. Over the years, the power capability of USB increased substantially from the original 2.5 watts to 100 (see USB Power Delivery). See also poweredUSB.
MaximumVersion Volts Amps Watts USB 2.0 5v .5A 2.5w USB 3.0 5v .9A 4.5w Battery Charging BC 1.2 5v 1.5A 7.5w Power Delivery over USB-C cables PD 5v 3A 15w PD 9v 3A 27w PD 15v 3A 45w PD 20v 5A 100w See USB power delivery.