Voltage(V): 5V Capacity: 3500MAH portable battery charger for iPhone4/IPAD/IPOD/iPhone3/MP3 MP4 portable battery charger for iPhone4/IPAD/IPOD/MP3 MP4 iPhone3GBattery ... USB port.Function is introduced1,Dual USB output could supply power for ipad iphone, MP3/MP4, PDA PSP MID, Mobile ... phone 2,High Efficiency of power conversion(90%) 3,Flash light 4,Powerful with long operation ...