Do your steam as you like - with a 18650 battery or perhaps with two? The Joyetech eVic VTC Dual leaves the steamer spoiled for choice: plenty of maneuverability and best ergonomics with a rechargeable battery or sub-ohms power-wattage with ultimate performance from two rechargeable battery cells. Complementing this, Joyek's eVic Dual Battery Cartridge comes with two interchangeable back covers that seamlessly match the battery size. As is common with all battery makers, you must purchase the 18650 battery cells separately when purchasing the Joyetech eVic VTC Dual as these are not included in the scope of delivery. Matching the Joyetech eVic VTC Dual, the Startserset includes a Ultimo Clearomizer with 4.0 ml liquid capacity made of stainless steel and indestructible Pyrex glass. With a diameter of 22 mm, the Ultimo Clearomizer is the ideal partner for the eVic VTC Dual battery carrier. All settings are displayed on the generously sized OLED display, in RTC mode even the date and time are included in the display. Techies love the upgradeable firmware of the eVic Dual, the latest version of the firmware can either be purchased as a package for Windows or the Mac and installed.