The Ooze Tanker Thermal Chamber VV 510 Battery packs a hearty 650mAh power level, 4 variable voltage settings, and universal 510 threading, making it functional with many vaporizer cartridges. The Tanker Battery features a stream-lined thermal chamber which fits around the cart to protect it from drops and hits. Additionally the thermal chamber works to improve airflow, especially with thicker juices and to contain heat and provide a steady warm temp that ensures smooth hits no matter the environment. Some larger cartridges may not fit inside the thermal chamber, but will still function with the 510 threaded battery base.A micro USB charger is included with each vape pen. The Ooze Tanker Battery also has a Preheat Mode that can be activated by two clicks of the button to heat at a low voltage for 15 seconds with no extra button pressing required. Multiple colors available. Highlights 650mAh variable voltage vaporizer battery 4.25 inches long Thermal cartridge chamber Universal 510 threading 4 voltage levels 15 second Preheat Mode Micro USB charger included Multiple color options available **Cartridges sold separately**