... such as iPod,MP3 2000mAh 5000mAh portable battery charger for iPhone 4 4S,iPod,PSP,GPS,MP4...Number: ... high- capacity lithium polymer core can be provided for the 7-8 block of ordinary saturated lithium batteryDurable ... ,to prevent power lossA machine can be fit for all devices with USB charging,such as mobile ... 4G 4S,PSP,IPOD,MP3,MP4,GPS,Bluetooth,digital cameras and so on.Plug and play,power output ...