Just a quick note . . . I have seen all the reviews on these and "game changer" is all the hype on the net . . . guess what? . . . these are the bees knees! I bought the 1000 mahs from Stormy and they are performing as well as my Provari . . . in fact, they might even be better! . . . I am a true chain vaper and get about 5 hours out of them at 4.8 volts . . . they hit like a freight train and produce thick clouds of vapor with a double-punched std Boge . . . the Arry ActV3 tanks look kinda funky on them and they are quite "long", but I don't care about that . . . these things ROCK and so does Stormy!