... batteries, up to more than 500 circles, the power can still remain 80% after 3 month.3. ... correct connector for the device.2. Connect the charger and device with the connector and USB cable.3 ... for 3 seconds, LED lights turn on, the charger begins to charge.4. After charging, keep pressing ... as overheating,fuming,catching fire.2. Please charger the mobile charger completely before the first time using it.3 ...