I run my .3ohm build at 45 watts when It's hot outside so that I get a cold vape. Trust me. If I can run a .3 dual coil on my dark horse at 45 watts, the istick can handle it. Now, I do prefer the output of the .5 on my troll at 40-50 watts, and it is on the 50 watt. It's a great device. Great combination. You can run a dual coil build all day long on the 50 watt.Based on what? It handles .3 dual coil just fine