Dual Micro USB 3.7v to 5V 2A Mobile Power Bank DIY 18650 Lithium Battery Charger Module With Led. This is the mobile power module Accessories, 18650 Circuit board shell. Meet the individual needs of your DIY, 

The following points should be noted when installing products:

1. Batteries to parallel, the voltage in 3.2-4.2V can work between, 18650 flat and polymer battery can be.
2. The battery is connected to the motherboard B + negative-, installed against the necessary burning motherboard.
3. New and old batteries, model brand inconsistent batteries cannot be mixed.

Package Includes:

1 x Dual Micro USB 3.7v to 5V, 2A Power Bank DIY 18650 LiPo Charger

Specifications and Features:

1. The built-in lithium battery protection IC, over-current, overpressure, under voltage protection;
2. Dual USB output ports.
3. Weight: 10 gm
4. Input port: MicroUSB (Android)
5. Input requirements: 5V constant voltage power supply can do charge input power, the most matching charger for 5v1a above
6. Output port: USB
7. Output parameters: 5V1A/5V2A
8. Requirements for rechargeable batteries:
9. Compatible Batteries: 18650 batteries, cell phone batteries, flat-panel batteries, MP3 batteries, etc. 3.7v-4.2V polymer Lithium battery,