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AA313

Dual Micro USB 3.7v to 5V 2A Mobile Power Bank DIY 18650 Lithium Battery Charger PCB Board Boost Step Up Module With Led

4-level LED lamp display power, not working state intelligent automatic shutdown;

The built-in lithium battery protection IC, over-current, overpressure, under-voltage protection;

Dual USB output ports.

Input requirements: 5V constant voltage power supply can do charge input power, the most matching charger for 5V 1A above

Requirements for rechargeable batteries:

Compatible Batteries: 18650 batteries, cell phone batteries, flat-panel batteries, MP3 batteries, etc. 3.7v-4.2V polymer Lithium battery.

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