... at the same times.3. rechargeable large capacity battery inside for fully charge your iphone/ipod, mobile phones, mp4, camera, DC, PSP ... discharge, over current, short circuit protection to sure your iphone/ipod, mobile phones, mp4, camera, DC, PSP not been charged ... to 500 times6. warranty of this external back up battery pack long for 12 months.SpecificationInput: 5V/500mAOutput: 5V/1A standard USB ...