I always felt that unless I used 32g kanthal my zmax was alittle wussy. Even at 15 watts on 30g it never really had much umph. I just got 2 IMR 18350 and tried it stacked and WOW. With 30g kanthal at 15w it instantly melted the top wire from the wick. im down to a friendly 4v on a 1.5 ohm coil and its vaping like a king! Read up on how to treat stacked batteries as they can be alittle more dangerous. But if you are like me and your zmax is collecting dust give this a try. Its like a whole new pv 
