... ;5 Smart in size and appearance;6 900mAh rechargeable battery;User guide:Assembly the battery and cartomizer with smoke juice correctly. 1 ... LCD blinks 3 times, the device starts charging, the battery indicator shall be moving, and the LCD screen shall be turned ... voltage is lower 3.3V(+/-0.2V), the blank battery indicator shall blink 15 times, and the device stops working;8 ...