... Backup battery for iPad 2,iPhone 4,iPod 1.Capacity:4800mAh 2.Input:5V,1A 3.Output:5V,1A Backup battery for iPad ,iPad2 ... power out for charging any device that powers from a USB socket such as iPod , iPhone ,iPad 2, Cell phone ... to save battery when not in use .Compatible with:iPad , iPad 2 , iPhone 3G/3GS,iphone 4 ,Cell phone , ... :5V 1AOutput:5V 1A Backup battery for iPad 2,iPhone 4,iPod,Blackberry