Qualcomm’s Quick Charge is designed to deliver up to 24 watts over a micro USB connector so as to reduce ... [Septillion] and [Hugatry] use a 3.3 V Arduino Pro Mini to talk to the charger ...
It also has fewer pins than other boards, and its USB port is somewhat outdated ... Since it has more usable flash memory than the Micro (30 KB vs 28 KB), it's better at handling long sketches.