... with USB charging,such as iPod,MP3 2000mAh 5000mAh portable battery charger for iPhone 4 4S,iPod,PSP,GPS,MP4... ... ,charge and discharge cycle ≥ 500 timesIntelligent contral,microcomputer intelligent power monitoring and displaySpeed shuttle,a key enabling all operationsAuto-sleep ... ,non-working state automatically sleep,to prevent power lossA machine can be fit for all devices with ...