According to their own Web site "optimal vape is 11.5 watts" if it does not vape like it should at that, you can always return it. I haven't used it myself, nor have I read comments of other users but I have read the manufacturer Web site. If you do need a upgraded mod or considering getting one that can run the delta with more wattage, may I make a suggestion? The ipv2 50 watt box mod is a great device. It has some of the newest technology chip inside, the yihi sx330 v2. It has touch firing as well as traditional firing. It will give a consistent vape up to 50 watts and can sub ohm down to .2 watts. It's light, and we'll made. It takes one 18650 battery which can be charged with provided usb charger as well as a external charger. It's thinner yet taller than the Dna series but lighter than the mvp2. They sell for about 110 dollars but are worth every penny. It's a mod a beginner can grow into. It displays battery, volts, ohms, and wattage. It's easily locked and unlocked. Very portable and looks nice! If your considering upgrading I highly recommend this mod. It will NOT disappoint! ! As far as the delta goes, you can try it at recommend wattage and if it does not perform you can possibly return it. Or better yet read the reviews and see what people are saying about it then make your decision to buy or not..I hope this helps a bit.