... devices with USB charging,such as iPod,MP3 2000mAh 5000mAh portable battery charger for iPhone 4 4S,iPod,PSP,GPS,MP4...Number:MA8323Main ... automatically sleep,to prevent power lossA machine can be fit for all devices with USB charging,such as mobile phone,iPhone 4G 4S ... ,PSP,IPOD,MP3,MP4,GPS,Bluetooth,digital cameras and so on.Plug and play,power output ...