Smart Screen Display Battery * Battery capacity: 650mAh
* Dimension: 65*21*16mm
* Thread: 510 thread * Compatible with 510 batteries
Functions:
* 3 clicks adjust voltages
2.7-4.0V (0.1V increase every click)
* 2 clicks preheat, 1 click cancel preheat
Button-Activated
* Feature: Screen Display Power and Voltage