There's warnings with the literature, but I didn't known about the potential dangers or damage with LiPo's until I did more research.Why do they not make this info known when you buy these products?
Well here's the rest of the story, I bought the set that came with aluminum case, the hand held thing and 2 batteries, the issue is I also purchased 2 batteries off ebay that stated they were new but not from Yuneec.Regarding your puffy batts. Contact Yuneec, batteries are warrantied for a short period of time. Maybe there's something they might do. It's a long shot, but it couldn't hurt to ask.