I mentioned the situation with batteries before. divers often have little knowledge of what theyre doing when it comes to batteries. the fact that most torches rely on 18650s is the root of the issue, as despite spending often hundreds or even thousands on lights I see so many divers using unprotected 18650 cells in them, not realising what this actually means. add to that that the abuse these cells suffer is often on the high end of the scale, its a recipe for problems. you can purchase fireproof mats btw, RC hobby stores will often stock these charging 'mats' or 'pouches'.