... variable voltage battery 0.2v per twist CE,RoHS,SGS,UL OEM is welcome Hottest Ego C twist ... 2v-4.8vMatch atomizer:ce4,CE5,CE9 ,ego-t,ego-w,ego-c,vivi nova,etc.Color:white,black,pink ... there are 8 grids on the knob at the battery bottom,and each represents 0.2V. 3.Intensified ... switch protection,atomizer protection, low voltage protection.4.The Battery also has the previous lock / unlock function.Remark ...