This is a variable volt device produced by Vision. It has a rechargeable lithium ion 14500 battery included. The VOT adjusts from 3 to 6 volts with the push of a button located by the display on the bottom of the battery. The switch has a 5 click on/off feature for safety. There is an eGo connector on the top so all of your eGo clearomizers or cartomizers will work just like on an eGo battery. The LED display is easy to read and has both a voltage reading and a battery life indicator so you will know when to charge it.
The battery can be removed from the bottom of the VOT for recharging.
If you like eGo batteries this is the one to get.