Whats up? I'm no pro lol, but I would guess that the batteries that you ruined were automatic(no button, just inhale). Those are very easy to kill sometimes. If you refill, like almost everyone does, juice WILL eventually run through your carto, and find it's way into an automatic battery. The auto's have to have a hole in them to activate the battery when you inhale. Manual's(like the IGO), are sealed(to a degree). So there is much less chance of this being a problem. I can't ever remember anyone having a problem with Drew from Inhaler on these boards. Not to say that some may have had issues. As for me, I've never had to contact him with an issue yet. And that's with a total of about 6 orders. So that's not what people would consider a "Whole lot" of experience with a vendor. But I say it's a good start lol.