... 2.install high quality li-ion battery,fully power supply.3.dual circuits protective ic,effectively provent over charge , ... 2.install high quality li-ion battery,fully power supply.3.dual circuits protective ic,effectively provent over charge , ... CE,FCC,RoHS certificate,reliably,quality assurance. Specifications:Item: MIUI Power Bank i520Interface: USB(out) Micro(in)Capacity: 3000mAhWeight: 141gInput: ...