This. You don't put it out, the fire is caused by a chemical reaction in a closed case. You can't stop it, only insulate it from damaging everything around it b

This. You don't put it out, the fire is caused by a chemical reaction in a closed case. You can't stop it, only insulate it from damaging everything around it by dumping it in sand. The fire is just a byproduct of the extremely fast exothermic reaction taking place in the battery.