... Connect the USB line to charger the battery, the LCD blinks 3 times, the device starts charging, the ... battery indicator shall be moving, and the LCD screen shall be turned off when it is full ... else, the device shall come to standby status;7 When the battery voltage is lower 3.3V(+/-0 ... stops working;8 Short circuit protection: LCD Screen shows “F2”; 2013 LCD Display with knob switch Mini VV Ecig ...