I haven't read all 181 pages of this forum to see if this has come up but I'll ask. I'm sorry if it's a repeat question. I have a black subox mini and I'm using the black subtank that it came with and a .5 coil. It's about 3-4 months old. Most of the time it works well and is a good vape but every once in awhile if it sits for an hour or more and I take a puff I get this hit that feels like I'm getting all 50 watts instead of the 25 or so it's set at. The same thing has happened with 2 different batteries so that's not the cause. Both are good quality batteries from reputable shops. After that one hellacious hit the battery loses about a bar of charge. Has anyone else had this happen?