Quit smoking, started vaping on 12/9/09.
Currently, I use Kanger Mini-Protank 3, with some sort of big ol’ carbon fiber-wrapped batteries. They last about two days before I have to charge ‘em up.
I carry two e-cigs. One’s loaded with unflavored nicotine fluid (36%; strong) that tastes like tobacco (so THAT’S where the flavor comes from...), the other is filled with butterscotch.
I have quite a bit of obsolete equipment in boxes all over the place. One of these days, I’m just going to toss it.
E-cigs saved my life.
Of that, I am absolutely sure.