I just double checked. It
I just double checked. It seems Lithium Metal batteries are susceptible to fires in water, but lithium ion batteries are made specifically to be water resistant. When a lithium ion battery catches fire water is one of the recommended mediums to extinguish it. There may be numerous types of lithium ion batteries however, but I think the whole point of making them an ion battery instead of metal was to avoid the water problem. consequently lithium ion batteries have a lot less power than lithium metal. Hopefully battery technology will continue to advance.