I have to say that I'm on my 2nd dse905 and both of them have had problems. I tried to prime my atty with a quick puff and it shorted out and gave me a little jolt on the lips (no cart attached to the atty). Both versions have had the zombie activation problem and they become more frequent with more use. My second one almost caught the LED ring on fire. It completely melted and to tell you the truth I got rid of both of the ones that I have due to fear. I have a circle burn mark in my desk from the last malfunction. Sorry to say but this just isn't a device that should be trusted as of yet. V1 was bad and V3 is only better because it doesn't have a switch. I've read several reviews and more times than not there are some serious problems with unintentional activation. I would recall all of them before they cause someone's house to burn down.