Yes, i have done the math. Heres why i dont recommend sub-ohm vaping:
- First of all, like i said, it is a myth. Do the calculations: the math, and therefore the physics, behaves exactly the same way at 0.9ohm and 1.1ohm with difference only in numbers (and not the calculating process). So there is no such thing as "sub-ohm vaping". Get my point?
- Second: it is not that vaping at around 0.5ohm is dangerous by itself - it danger lies in the fluctuation, which, anyone who has experience in rebuilding will tell you, is inevitable. A jump of 0.1 ohm is to be expected - one slight nudge on the coil, one particle of dust or solid remains of juice, and it can jump. More significant fluctuations include hot spots: a 0.5 ohm or full 1 ohm drop is possible if you have hot spots, which can develop during use - as in, you can iron out all the kinks and have it running perfectly before vaping, and then a week later it just pops up with no warning whatsoever. These are not "lightning in a bottle" kind of chance: it happens on a regular basis on every build.
Now, lets do the math, shall we? A run of the mill, of-course-it-happens, zero-warning drop of 0.1 ohm brings your build to 0.4ohm. On a fresh battery running 4.2volt, you are now drawing 10.5amps. Boom goes the dynamite. Literally.
If you think about it, thats no different than sucking on a grenade with the safety pin already pulled. It will blow, any second now.
Just because you battery can push 10amps doesnt mean you should push it close it that. Think of the extra current capacity as a safety cushion for when things change, which it will. Like a car: yeah, i know your car can go 120mph, but dont do it.
No, i am not an overly safety-conscious geezer. Im a 20 year old math major (so yeah i can do the math) and have done more reckless things before i was 15 than many do in a life time. But there are risks, and then there are unnecessary risks born out of lack of knowledge. Sub-ohm vaping falls into the latter.