I bought the Jazz 18500 about a month ago. I got the kick upgrade and purchased the crown on the site. My problems are many! The first is the crown and the battery get extremely hot after about ten vapes. I have to fiddle with the crown (pulling it out and putting it back in several time to get it to fire. And if I leave the battery in it, it drains the battery when not in use! Someone help me out! Did I just get a bum pipe? I have tried to email the company twice and have received no support. They were very helpful before my purchase, responding in a couple of hours, now they are in the wind. 