18650, how dangerous is it for a newbie like me?

Batteries and Chargers Rechargeable Batteries
41

42

Lemme guess…10000mah ultrafire?

43

Hooooly crap, now that is how you do a good thread necromancy. I’m surprised more of those cells didn’t explode.

44

Pretty unlikely. As far as I understand, gypsum powder doesn't ignites easily. :-D

:-)