- Micro USB input: 5V 1A
- Dual USB Output: 5V 2A / 5V 1A
- Charging display: Intelligent digital display
- Batteries Type: Lithium-ion batteries (18650) 3.7 lithium-ion battery only
- Product Size: 57mm x 28mm
- Screen size: 27mm x 17mm
The circuit board is simply connected to the battery negative B-, B +. Please note that you can not reverse the polarity. Connecting reversed polarity will burn the board. also, note that the insulation between the battery and the circuit board, battery lead not to touch the circuit board, so as not to cause a short circuit.