Backup battery for iPad 2,iPhone 4,iPod 1.Capacity:4800mAh 2.Input:5V,1A 3.Output:5V,1A Backup battery for iPad ,iPad2 ,iPhone 4/ ... Off button to save battery when not in use .Compatible with:iPad , iPad 2 , iPhone 3G/3GS,iphone 4 ,Cell phone , and MP3 ... products that can be charged with USB ports.Specifications:Capacity:4800mAhInput:5V 1AOutput:5V 1A Backup battery for iPad 2,iPhone 4,iPod,Blackberry