1.rechargeable backup battery charger for psp,mp3,mp4,phones 2.charger for phones,pda,mp3,mp4,game 3.li polymer battery Its capacity reach ... function of charger and backup battery.You can charge your device such as mobile phone,game player,ipod,MP3,PDA,MP4 and ... strick test and have one year warrant rechargeable backup battery charger for psp,mp3,mp4,phones