power bank for iPad /iPhone high efficiency of power conversion electricity-saving function Specification: product name :power bank cell type:Li-polymer batteryCapacity:6600mAh/23Whinput :DC5V,1.0A(Max) Port1 output:5.0V,1A port2output:5.0V,2.1ACompatibility: Port1:cell phone,iphone,MP3/4,ipod,psp etc all digital devices charged via USB port Port2:ipad,ipad2.SamsungP1000,viewpad,or tablet PC