Opinion:
Jaoling
Qualcomm’s Quick Charge 1.0 technology was designed to maximise charging efficiency for up to 10 watts of power, by allowing for a maximum current draw of 2 Amps through a standard USB adapter and port voltage of 5 volts. Quick Charge 2.0 allows for an even higher level of power transfer between your power source and smart device, up to a maximum of 36 watts in certain scenarios. Qualcomm splits its 2.0 technology into two classes, A and B. We’re most interested in Class A, which applies to smartphones, tablets, and other portable electronics.
The specifications for Class A allow for a maximum charging current of 3 Amps, depending on the source. Your typical smartphone charger will run at 5 volts, drawing 3A of current boosts Quick Charge 2.0 up to 15 watts of power. This means that you can draw more current from a traditional 5 volt USB supply, thereby speeding up the charging time.
