I bought 5 of these about a year ago. I have been vaping one for a year and decided to press another one into service about 3 months ago and this morning that one died. Screen when black I knew the battery was getting low so I changed it out and the screen came back on. Then I noticed it was pulsing the atomizer without the fire button being pressed. I quickly removed the battery. And reinserted it and nothing blank screen no response. Funny that my first one is still running fine and it got dunked the White River when I wadded to deep and it wasn't in my waders waterproof chest pocket. Oh well still have 4 left.