This is a Variable Voltage version of the eGo/eGo-T 900mah Battery.

It is well known within the vaping community that different atomizers, cartomizers, and even different E-Liquids and flavors perform and taste better at different voltages.  This is why variable voltage is such a big deal.

With this battery you can adjust the voltage up and down for a premium vaping experience.  Simply press the activation button 5 times fast to cycle through the 3 preset voltage outputs.  An LED ring around the battery will provide visual confirmation of your voltage choice, so you are never wondering about what voltage you are using. 

When the ring is red, the battery voltage is held to a consistant 3.2 volts. 

A Purple ring indicates 3.7 volts

A Blue ring indicates 4.2 volts. 

*Higher voltages will cause the battery to drain faster, but with a 900mah capacity these batteries will still last a very long time between charges even at the highest voltage level.