Got it from MadVapes. ZMAX will work with two 18350's from a video I saw. Can't screw the top down but you can get an extender to make 350's work. If the clear max is a real ZMAX it should work with double batteries too. Can't seem to find a clear extender yet, but I have vapor shop down the street and they wanna play with it too. So I'll know if it works or burns on 7.4v by tonight. Need to make sure it has a 7 setup mode 1st. And if it has red/blue display.