I have 4 ProVari too and love them. Just got tired of changing batteries,18650s, 2-3 times a day and then having to take at least 2 light sabers with me when ever I go anywhere!
I use the 18490s and am pretty tired of switching batteries all the time and having to do one or two charge cycles a day. Then I remember I could still be smoking. It's a hassle but worth it.
I've been having equipment issues today. Damnable tanks....blah, blah, blah. BUT, now I'm SO excited. I think I've found my hero. I was SO disappointed in my Kanger Aerotank after I first got it. It wasn't doing diddly. I could barely get a pull on it. I played with the air holes. It just wouldn't act right. Tonight, I pulled it out again, and this time put it on my MVP. Dead as a doornail....... I changed the coil in it, and OMG, this has been my best vape yet!!! OMG! This leads me to think the coil that was already installed in it wasn't worth a poop to begin with.
So glad you figured it out. Been there, done that and it's so frustrating. The good news is you probably won't take long at all to figure out next time.