how do lipos go up in smoke/ flames?

[mk351e]

no, I know, i just wanted to know what happens b/c I do want to put them in some type of container while charging for safety. I think it would be wise to do this, and surely couldn't hurt!

So, I think i'm gonna put them in a big, heavy ceramic jar, with a top, and stuff it w/ fiberglass while charging. Charger is a super slow poke hyperion acdc unit (forgot the model number) w/ balancer.