1. Compact and lightweight design for easy carrying(only 32g).
2. DIY a power bank for your phone.
3. Indicator light show charging progress.
4. Please charge the batteries with USB cable or other chargers.
5. Compatible for 2 x 18650 Li-ion rechargeable batteries (not included).
6. Widely compatible for iPhone, Samsung, LG, Sony, MP4, etc..
7. Note: The battery can not be installed in the reverse direction, otherwise, it would burn the electrical panels.