... iPad,iPhone,GPS,mobilephones... USB Charger use for differnt digital devices:portable, rechargeable,high capacity , use for iPad,iPhone,GPS ... high capacity backup battery for iPad,iPhone,mobils,digital devices 5200mAh Backup Battery Model NO.: RFBB1 Charge for many ... is finishedDischargeConnect the device and battery pack by USB cable, it’s working after pressing the button1) Move the adapter2) ...