18650 Charging Board Dual USB 5V 2.4A Mobile Power Bank Module 18650 Lithium Battery Charger Board with Overcharge Overdischarge Short Circuit Protection

This module is a portable backup power supply with an input that matches the 5.0V adapter to charge the internal battery.
Use built-in battery for portable device to provide 5.0V/3.0A USB2.0 supply output for external devices.
Protection: overcharge protection, overdischarge protection, short circuit protection, constant current.
Charging cable: support three USB data cable charging, including Iphone and Android.
Dual output current: 5V 2.4A; Input voltage B+ to B-: 3.0 – 4.2V.
Note: The positive pole of the battery is connected to B+ and the negative pole is connected to B-, do not reverse it. If it is reversed, it will burn out!
size:6.5*2.5*0.1cm
colour:green
Material: PC+ metal

Connection Notes:

The circuit board is connected to the battery negative B-, B + is the positive, do not connecting reversed, connecting reversed will burn the board, the battery is connected in parallel welding, assembling battery.

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.