Just wanted to let you guys know something stupid that happened to me and might help someone else out. I was vaping my 2/3 all day. Put it in a bag and carried it to the car. Got in the car and started vaping then all of a sudden it started saying atomizer low. Took the tank off, put it back on just couldn't get it to work. Power was on with display. It ended up being the stupidest thing. The cover with the 3rd battery in it was on but not all the way on the bottom. Snapped it back in a started working again right away. Hope this helps someone and it happened to me more than once now !