I stepped into the world of variable wattage with my iTaste MVP but still found myself relying on using its variable voltage mode. I'd learned over time what voltages worked best for what flavors and I kind of stuck with it instead of learning a new set of numbers. Then I did something dumb. I changed out the head in my Protank and couldn't for the life of me figure out why my beloved cinnamon just wasn't vaping the same. I was convinced that I'd gotten a bum head and needed to throw it out. So that's what I did. And I put another one from the same refill pack into my Protank. And, well, same shit. What the crap was going on?
What I'd failed to realize is that I had been vaping for 5 or more heads worth on 1.8 Ohm replacement atomizer heads. And I'd inadvertently bought a pack of 2.2 Ohm atomizer heads. I will spare you the math and electrical engineering of the relationship between power (in volts, watts, and amps) and resistance (in Ohms.) Suffice it to say, I needed to be pumping higher voltage to into my coil to get the same results on this new coil. When I turned the voltage up, BAM, it was right back to what I was used to.
But that's sort of annoying. It's one too many variables for me to want to mess with. And that's where the beauty of variable wattage comes into place. It removes one. Ignore voltage entirely. If you have a variable wattage device and it works great at say 9 watts for your favorite cinnamon flavor, that 9 watts will always be the same resulting heat on your juice. No matter what kind of tank or atomizer or cartomizer or clearomizer or dripper or whatever I put onto the top of my battery. If my cinnamon tastes best at 9 watts in one thing, no matter what I put that cinnamon into, it will likely taste great at 9 watts.
Bear in mind, that is technically the theoretical ideal. I still find myself tweaking my settings a little here and there, but in the end, by moving to variable wattage, I've found that my numbers stay very consistent. It's just easier to keep track of. There's no having to think about what resistance coil I have in what kind of tank. All I need to know is cinnamon...9 watts. Good to go.
Simplistic explanation? No sense in wasting time on unnecessary details.