Just had a weird thing happen with my Vapor Flask KX-40D clone. I was doing an informal battery longevity test and when the battery icon showed no lines, the flask would fire at 30W@420F when I had it set for 15W@420F in TC mode. Kanthal mode worked fine. No amount of resetting or removing batteries would stop it. I even moved the temp and watts around. A new set of freshly charged batteries cured it and now the flask is back to normal. Anyone else try a battery check and see that?
I have only had mine 12 hours but will keep an eye out for that...nice that you can see the display while you vape.