... twist batteryBattery capacity:650 /900 /1000 mahVoltage available:3.2v-4.8vMatch atomizer:ce4,CE5,CE9 ,ego-t,ego-w,ego ... circuit to enable the adjustment of output voltage from3.2V-4.8V.with a smart buck-boost conventer inside,you can spin ... and overcharge protection,switch protection,atomizer protection, low voltage protection.4.The Battery also has the previous lock / unlock function.Remark ...