It is the largest variable volt eGo battery with 510/eGo threading, so it works with a variety of 510/eGo atomizers or tanks, or clearomizers.
The battery allows you to adjust voltage output from 3.3v to 4.8v by spinning the knob at the bottom. Each increment is 0.5v
*Each battery comes with no USB charger
* The spinner battery's button have a 5-click On/Off lock. Please press the button 5 clicks within 2 seconds and activate the battery.
* Using the battery at a higher voltage output will drain the battery faster than at a lower voltage. We suggest you to start with a low voltage and increase the voltage gradually until you find the right voltage for your atomizer/cartomizer.