A charger capable of providing higher wattage (energy/second) allows a device to charge faster. By now, device, USB characteristics and battery care services d

A charger capable of providing higher wattage (energy/second) allows a device to charge faster. By now, device, USB characteristics and battery care services determine how much is used. For example, my Xperia uses extra slow charging every once in a while for battery longevity - using the otherwise fastcharging adapter.