... backup battery charger for psp,mp3,mp4,phones 2.charger for phones,pda,mp3,mp4,game 3.li polymer battery ... such as mobile phone,game player,ipod,MP3,PDA,MP4 and so on through optional cable and connector accordingly. ... Current 500mACapacity 2200mahCharging Time 5-6HWorking Time about 4 h(depend on brand,model,operation)Size 76.8*60* ... warrant rechargeable backup battery charger for psp,mp3,mp4,phones