Motherboard comes with protection function:
Charging overcharge protection
Over-discharge protection
Overcurrent 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
Specifications:
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
Installation instructions:
The circuit board is connected to the battery negative B-, B + is the positive
Do not connect reverse, connecting reversed will burn the board
Note:
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.
Package included:
1 x Mobile Power Bank 18650 Battery Charging Circuit Board with Digital Display