Slate Wood Series Vape Pen Battery. Combines real walnut wood (which means every piece is unique) and slate anodized aluminum for a visually stunning appearance.The new release features a wider transition module to accommodate wider/larger cartridges. - Features a protected, cartridge drop-in design- Fits most 510 thread cartridges (included cartridge is non-functional and for merchandising purposes only)- Powered by a high-quality 300mAh lithium-ion rechargeable battery core- 3-LEDs indicate battery life and power settings- Four (4) power/voltage settings (2.4V, 2.8V, 3.2V, 3.6V)- USB magnetic charging port + cable- Compatible with Base Charger and Rover Cases- Dimensions: 4.3"L x 0.5"D- Weight: 29g