I have tried 2 fully charges 18650 batteries (I'm using extension cap), and tried pressing the button 5, 10 , 20, 30 times etc. I've tried holding it down for many seconds. I've never used a ProVari before, so maybe it's a safety feature that I'm missing. I did look at a pdf of the owner's manual on the ProVape site, not enlightenment there. Help if you can!
Thanks,
Keith
Thanks,
Keith