Same here.... no real heat buildup. But I don't think there is anything that isn't going to heat up. On the ViVi, I know it's hot on dry burns, but I've seen no detriment due to over heating during vaping. Most juices discolor, but they do in every tank I've had.
As far as batteries go, I've used single 14500, dual vv on 14500, 16340, 18350, and the iTaste. I've noticed no undue battery usage. Of course, there are a lot of variables when comparing battery consumption.
Sorry the ViVi isn't working out for you, but if one thing worked for everyone, guess there would be only one on the market. Good luck finding your perfect vape!
As far as batteries go, I've used single 14500, dual vv on 14500, 16340, 18350, and the iTaste. I've noticed no undue battery usage. Of course, there are a lot of variables when comparing battery consumption.
Sorry the ViVi isn't working out for you, but if one thing worked for everyone, guess there would be only one on the market. Good luck finding your perfect vape!