... rechargeable,high capacity , use for iPad,iPhone,GPS,mobilephones... USB Charger use for differnt digital devices:portable, rechargeable,high capacity , ... Cut power supply from the electrical equipment2) Connect the adapter to AC power3) LEDs blink circularly when you plug ... adapter into DC input jack4) All LEDs are on when the charge is finishedDischargeConnect the device and battery pack by USB cable, ...