Kanger Evod VV Battery is a variable voltage battery. This battery voltage can be adjusted from 3.2 – 4.8 volts in 0.1 volt increments. It also comes smartly equipped with both 510 and eGo thread compatibility. And there are three important safety protections: Short Circuit Protection, Atomizer Protection, and Low Voltage Protection.  The eVod VV battery also has a 5 click on/off feature, making it easy to avoid misfire in your pocket or purse.This battery has a 1000mah capacity which translates to about 7 hours for the average vaper but please keep in mind your mileage may vary depending on how often you vape and what voltage level you are using.