... Hottest Ego C twist no flame e-cigarette variable voltage battery 0.2v per twist CE,RoHS,SGS,UL OEM is welcome Hottest ... are 8 grids on the knob at the battery bottom,and each represents 0.2V. 3.Intensified short circuit protection,discharge and ... overcharge protection,switch protection,atomizer protection, low voltage protection.4.The Battery ...