vapormike, yeah, they'll do fine with the autos because they don't leak, well, mine haven't yet. One guy on the gotvapes forum said one of his had a drop of liquid under it when it was sitting on the table. Even if it was just a drop, that would be enough to damage your battery. I only use the Vortex 2.0 with my manual batteries, because it MIGHT leak. If you know your auto batteries are sealed, you could use 'em and not have to worry about it.
optimo, I know about the higher ohms/voltages but I thought since the 2.4s got so hot, they might be what's burning the juice. My reglular Boge cartos are 2.7 and they do fine. Guess I won't be using the Vortex until they come out with a 2.7ohm. Good luck to you guys though.