Powerbank 20000mah from XiPin with two USB outputs that allow you to charge two devices at the same time. The high input and output intensity ensures loading speed . Four LED lamps inform about the charge level.
This AA boost module integrates with TI's TPS61032 auxiliary chip, which is capable of producing 5V 1A with input above 1.8V . The only difference between V1 and V2 is to change the output current from 2A to 1A.