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.
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.