Yeah, plenty of power. Theoretically you can pump up to 30watts out of this thing. 6volts to 1.2ohm atty. Why would one want to do that I don't know, but at least you can LOL.
But like meatsneakers said, you need the input voltage of stacked 18350's (or 650's) to do this and a single 18650 (or 350) will max around the 3amp limit which comes from, if I remember correct, from pbusardo's review when he measured/said that the 1.5ohm tops off at 4.5volts. Which would give 13.5w which is plenty.
With an eGo MDCC you want to have the stacked combo if you really wanna drive it properly, it sure gives a satisfactory vape at 4.5volts but I like to run mine at 4.8-5.0v depending on the
juice, which gives me, for example, on this 1.6ohm MDCC between 14.4-15.6w.
P.S. I use this calculator, simple and it works.
Watts - volts - amps - ohms conversion calculator