DM183, I'm glad you posted that. I've have my eBike batteries (three 48vdc 7.8 AH each) in a 20mm ammo can (it is the style of the 'normal' 30 & 50 cal cans only larger) and have wondered if I have a false security in that. Burning lithium batteries are way out of my lane, and knowing you are not only an all round smart guy, but have been on the forefront of this tech, so if your Jerry can wall thickness is adequate protection, then my ammo can thickness should be good also ? My concern has been if one or more of the batteries light off they will burn hot enough to just turn the ammo can into poor man's thermite and add to the blaze.