I had one puff up and go HOT and vent at the field. It never burned, but you would not want to touch it.

It happened because I charged it at too high a rate, my bad. I was just getting into elect and lipo's

I try and stay at 1C charge rate, no matter what the battery says it can be charged at. If I want to fly more I try and have more batterys for that plane.

I agree, I think the lipo's are safe. but we must treat them as they need to be treated.

I also do not leave them unattended while charging, I have a special charging station in the basement. Its fire proof.

sticks