That's what chris said about mine (transistor). I like my vp pass through enough to where I will be taking the atty off when not in use and or unplugging it. That is of course when I get it back. It's been one day without and I already miss it. I've got all sorts of bats on rotation over here kr8s, cr2s, 510s. I don't think I have a bare wall outlet left in the house. lol
I pretty much am a constant vaper.