1)18650 Li-ion battery 2)Capacity: 2200mAh 3)Portable, rechargeable and universal power 4)Adopts advanced single-chip Specifications: ... 2.5 hours High security: protection for overcharge, over discharge, overloading, and short circuit. The mobile power pack fits for ... over-charge, -current, short-circuit Adopts advanced single-chip Power bank could charge smartphone, Sony's PlayStation PSP, MP4 player, ...