This is the mobile power bank module Accessories for the 18650 Circuit board shell. Meet the individual needs of your DIY, but you must understand basic electronic assembly.

Features Of LCD Display Dual USB 5V 1A 2.1A Power Bank:

1.  Over Charging Protection
2.  over-discharge protection,
3. overcurrent protection.
4. Intelligent output device after charging full
5.  automatically stop charging, to prevent mobile phones overcharge.
6. Output voltage and current stable, will not harm user devices.

Specifications LCD Display Dual USB 5V 1A 2.1A Power Bank:

1. Micro USB input: 5V 1A
2. USB Output: 5V 2.1A / 5V 1A(Dual USB interface)
3. Charging display: intelligent digital display
4. Batteries Type: liquid lithium-ion batteries (18650) 3.7 lithium-ion battery only
5. Product Size: 57mm x 28mm
6. Screen size: 27mm x 17mm

Installation instructions:

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

Package included:

1 x Mobile Power Bank 18650 Battery Charger PCB