This is the circuit board to make a power bank.
Designed to meet the individual needs of DIY power bank.
Motherboard comes with protection function:
Charging overcharge protection
Intelligent output device after charging full
Automatically stop charging, to prevent mobile phones overcharge
Output voltage and current stable, will not harm user devices
Micro USB input: 5V 1A
USB Output: 5V 2.1A / 5V 1A(Dual USB interface)
Charging display: intelligent digital display
Batteries Type: Any lithium-ion batteries
Product Size: 57mm x 28mm
Screen size:27mm x 17mm
The circuit board is connected to the battery negative B-, B + is the positive
Do not connect reverse, connecting reversed will burn the board
There should be proper insulation between the battery and the circuit board
No battery lead should touch the circuit board, so as not to cause a short circuit.
1 x Mobile Power Bank 18650 Battery Charging Circuit Board with Digital Display