Backup battery for iPad 2,iPhone 4,iPod 1.Capacity:4800mAh 2.Input:5V,1A 3.Output:5V,1A Backup battery for ... USB socket such as iPod , iPhone ,iPad 2, Cell phone ,PDA and MP3 player .4:Compact size , unique streamlined design , high wear ... when not in use .Compatible with:iPad , iPad 2 , iPhone 3G/3GS,iphone 4 ,Cell phone , and MP3 with USB charging capability ...