No. The cf is in no way a mech. It is a 40 watt 2000 mah 4.2 volt device. Had a spring loaded connector pin at the top and was made specifically for the Atlantis tanks. Not a mech. Just a non adjustable regulated device that fires from .3 ohms to 1 ohm. The same resistances as the minimum and maximum ohm coils you can get for the Atlantis. Coincidence? No.
Oh Ok. I stand corrected. Not very familiar with that device.
Either way, 40 watts is 40 watts. And the .3 coil doesn't perform very well at that low of power. The vapor production is very light and there isn't a whole lot of flavor.
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I just looked it up. It doesn't have a 40 watt limit. It has a 40 amp limit.
It'll change it's wattage based on the resistance of the attached coil. It maintains a fixed voltage of 4.2. So when you used it with the .3 coil, it was firing at ~58 watts.