This 510 battery is a great vape battery that features a 350mah capacity and variable voltage settings. Adjust your settings based on the type of e-liquid or oil you are vaping. The Metrix 350mAh Vaporizer Pen Battery features the preheating function. Another, It’s a vape battery got the on to turn on/off, easy to use and operate. It fractures the variable voltage function and you can adjust voltage from the bottom from 2.0V to 4.0V. Main Features: Battery capacity:350mah 2 Clicks to preheat Adjust voltage by spinning the bottom ring Compatible with all 510 cartridges Diameter: 11.2mm  In the Box 1 x 350mAh VV Battery 1 x USB charger Category: 510 Thread Battery