Fireproof case for eFoil lithium battery

No, I carry 4 lithium batteries for a phantom 4 drone on one boat, and 2 seabobs on another boat. The biggest issue with lithium is when charging them. We charge them outside on deck. It wouldn't hurt to have a fireproof case. How big is the battery? You can get those Sentry fireproof safes at Walmart and such, now while made of steel and not glamorous, they are cheap. Under $100.

Good advice from Capt J.

Those bags can be found through hobby retailers and are fairly inexpensive. They work, but there will be outgasing.

There are about 6 different chemistries used in production of lithium batteries, some are much more dangerous than others. so check the type you are using. Also we are talking about " lithium ion batteries" that are rechargeable, lithium batteries are not. I agree with all the advice above. Here is a link explaining the different types.

https://batteryuniversity.com/learn/article/types_of_lithium_ion

I think it's a little over-rated. Most of the fires are from the super rapid chargers and charging them very very quickly. Most of the fires I hear of are from the RC toy batteries and rapid chargers that charge the batteries in under 20 minutes. Makita, Milwaukee, Dewalt, etc. have been making Lithium Ion power tools for 5 years now (drills, impact drivers etc.), you probably even have some, and I haven't heard of any of those batteries blowing up.

I doubt Boeing was worried that much until its new Dreamliner got grounded over lithium ion battery fires. As to your original question storage, I would store each battery separately or at least have them separated by a barrier so they can't bounce around in rough seas. Lithium is flammable on its own, but all chemistries also have a oxygen or phosphate molecule (oxidizer) that is easily shed off if over heated. Add heat or a electrical arc and you got your fire triangle, ignition source, fuel and oxidizer all in one. Biggest Risk is while in use or charging, but that's not always the case.

And how cool is that new toy!! I wonder what the learning curve is?

They recently installed a "battery containment" bag with some pretty impressive looking gloves in my cockpit. On a boat you can just throw the **** thing overboard.... kinda hard to do at 35,000 feet. I have no idea what the 230 something idiots back there are bringing on board. Doesn't give me the warm and fuzzies.