Loaded up my Omicron with a fresh 14500 and the 3.7 herc. Fired it up and within 20 seconds i am getting tasty vapor. I continue to hold the button down after my first hit and go in for a second. This time i got a really nice hit. I then feathered on and off to keep the herc hot, but not too hot. I got through 2 full loads with 1 battery no problem. I could most likely do more if needed.