... ,blue tooth,MP4,MP3 1).Feture of the power bank 1.Intelligent designing provide the emergency charging ... the batteryPut the battery into the body of power pack with correct polarity as the indicate ... , Car adaptor, AC adaptor or other USB power source.Charging will start automatically. Instant battery energy ... showed on the LEDindicator. When all of 4 lights stay on without flashing, the battery is fully ...