iClever POWER CASTLE 12000mAh Portable Dual-Port External Battery Pack Power Bank Backup Charger 12000mAh high capacity; 5 full charges to iPhone 5S,almost 3 charges for Samsung Galaxy S5,or one charge for your iPad2 Stylish aluminum alloy shell with blue LCD display. The intelligent LED status bar indicates the current battery status Output: 5V / 3.1A(Max)dual USB port for charging two devices simultaneously and rapidly . Input: 5V / 1.5A ,1.5A adapter(not included ) for the fastest charging time Brand New AAAA Li-Polymer battery cell ensures reliability, safety; 500+ recharge cycles over the life of the battery Multiple safety protection mechanisms: protection against overcharge, overload, overvoltage, over-current, and short circuit