YOU SHOULD GET THE OILAX CITO 510-THREAD BATTERY IFâ€¦ You are looking for a straightforward 510-thread battery that offers multiple voltage settings and can handle a large variety of 510 oil cartridges. The Oilax Cito is compatible with 510 thread cartridges up to 13.5mm in diameter. BUTTON ACTIVATED The Oilax Cito is button activated, allowing you to simply hold down the button to power your 510 oil cartridge. The button allows you to activate pre-heat mode which will warm your liquid before its vaporized. 4 VOLTAGE SETTINGS The Oilax Cito offers 4 voltage settings 3.4V, 3.6V, 3.8V, 4.0V. Offering users an excellent range which should work with most oil cartridges on the market. MAGNETIC CONNECTION The Oilax Cito includes a magnetic adapter ring that connects to the threads of your oil cartridge, making connection a snap.