power bank PCB 18650 battery charging LED indicator 3 USB output 5V 1A board 4.2V 3.7V
The 3 USB Power Bank module is a single-chip solution design for mobile power.
It includes a load management module. And also, an LED indication module and a protection module.
This board is mostly used in batteries for boosting.
It has a low Static Current, as a result, the whole circuit only consumes 1mA. Â There is no need for manual operation on this board.