USB 2.0's power supply capability of 2.5W ([email protected]) was raised to 4.5W ([email protected]) with the advent of USB 3.0. Likewise, the power supply ...
Specifically, Quick Charge 2.0 protocol provides output voltages of 5V, 9V, 12V and 20V and a maximum of 18W four voltage level charging . The QC 2.0 symbol is a lightning bolt plus a circle with a Class A or Class B indication as shown below.