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.

Have the insurance companies ever made a statement or requirement regarding unstable Lithium batteries on board?

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

When I read or hear about battery (L-I) fires, I feel the hairs on my neck pick up.
The same effect when I smell gasoline around boats.
I want to run somewhere else.
Sadly, these batteries are all around me and I don't know where, how well they are handled, or when one will light up.

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.

Yep, I have witnessed the aftermath of a cordless drill motor battery (LI) left in the charger.
We were involved in the cell phone cluster F also.
Who's issue is it when using a fast charger? Charger company going to purchase a new home or boat when the equipment is sold, used and fries?

I'm smelling some fumes again.....

There is something to this mess or we would not have a topic and conservation on this now.

Let me type this slower so all can understand my concern;
these batteries are all around me and I don't know where, how well they are handled, or when one will light up.
In the boat or house next door? In the back-yard or marina shop? In the purse next to me in an airplane?

A 29lb Battery in a device that gets wet.
And, not a device on board to put a battery (LI) fire out.

https://www.citynews1130.com/2019/05/17/electric-vehicles-fires/

My friend. Your defending the battery pack now? In 37 hours your comfortable over your OP or other comments??
Your the captain...
Please keep us up on battery performance and issues you may observe.

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.

Has the factory already considered battery storage?
I wonder if the battery is shipped not installed and in a shipping-storage case of it's own?
Maybe spare batteries come in a shipping-storage case also?

Look forward to a video of Pascal tooling around on one of these thingies.

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.