... rechargeable backup battery charger for psp,mp3,mp4,phones 2.charger for phones,pda,mp3,mp4,game 3.li polymer battery Its ... usb output and have double function of charger and backup battery.You can charge your device such as ... -6HWorking Time about 4 h(depend on brand,model,operation)Size 76.8*60*16MMWeight 68gOutput: usb ... have one year warrant rechargeable backup battery charger for psp,mp3,mp4,phones