Here’s my 2 cents. Research shows your body absorbs about 1ml of nicotine per analog. (some goes as high as 1.6, but lets keeps it 1 ml for this argument, and is the more accepted standard and makes it easy, 1=1). So if you vape 3 ml of 12 mg juice per day, that’s 36 analogs, or 2ml of 24 mg juice, that’s 48 analogs, and so on.
BUT here’s the catch. This is assuming 100% absorption rate, which I can tell you IS NOT the case. There is no research or studies on how much nicotine is absorbed through vaping. But I can assure you its not 100%. Remember, an analog has about 8mg of nicotine each before it is smoked, but most of it is lost in the flame/ash, and a little just isn’t absorbed in the lungs (i.e exhaled).
But if I had to take a guess, I would say between 60-80%.. Maybe? I dunno.. that’s a complete guess. When I first quit analogs, I was a 1.5 pack/day smoker. I vape 3-4ml of 12mg juice/day. And in the beginning, I did suffer from nicotine withdrawal. Its been 4 weeks for me, and I cut back to 2-3ml, and I’m fine now.
Also remember to, the soft bottom caps are thicker than the plastic ones, so you can’t put as much juice in the tank. And leaving room for the ‘air bubble’ at the top, you only get about 75% capacity of the tank. I believe the type B tank advertises 2.5ml, but I think you would be lucky to get 2ml. I know with my type, they advertise 1.2ml, but I could never get more than 1 ml with regular bottom, and only get .75 with the soft bottoms (I measured with a precise 3ml syringe)