... devices with USB charging,such as iPod,MP3 2000mAh 5000mAh portable battery charger for iPhone 4 4S,iPod,PSP,GPS,MP4...Number ... ,charge and discharge cycle ≥ 500 timesIntelligent contral,microcomputer intelligent power monitoring and displaySpeed shuttle,a key enabling all operationsAuto-sleep ... and so on.Plug and play,power output using the USB port,plug in the portable data lines can be realized ...