... .1. Connect USB cable to USB port of battery charger to charge digital device like ipad, mobile phone, mp3, mp4.2. LED ... right transfer connector for your mobile phone and digital device.5. Battery charger can charge digital device with 5v such as ipad, iphone 3g/4g ... mobile phone,mp3,mp4 and PSP at anywhere.6. Remove digital device from battery charger after complete charge.LED light off mean battery ...