Since extreme temps are bad for these batteries, I can’t store them in my shed here in NH. An option I’d considered is renting a small storage unit (I have over a dozen of them in different sizes for yard equipment), but that’s expensive.
The only other option is stick them inside a wood burning stove which I’m not currently using, but that wouldn’t hold more than 5 or 6.
Any other suggestions? I don’t want to burn down my house, and I have these things sitting around the place. Thanks.
One form of the “fire safe” I saw advertised was a bag made of fiberglass cloth. I don’t know if they are still marketed, but you could easily stitch one up out of a fire blanket as sold on Amazon. You’d want a separate bag for each battery.
https://www.amazon.com/s?k=welding+blankets&i=tools&ref=nb_sb_noss
Ammo cans are still a possibility if the batteries you are thinking about will fit into them.