... portable battery charger for iPhone 4 4S,iPod,PSP,GPS,MP4...Number:MA8323Main functionAdvanced aluminum materials,feel comfortable,wear ... 7-8 block of ordinary saturated lithium batteryDurable,charge and discharge cycle ≥ 500 timesIntelligent contral,microcomputer intelligent power monitoring ... 4G 4S,PSP,IPOD,MP3,MP4,GPS,Bluetooth,digital cameras and so on.Plug and play,power output using the USB ...