antboy
Well-Known Member
Yeah, I wouldn't trust the most common "fireproof" bags sold on Amazon and Aliexpress. The Crazy Russian Hacker tested a couple back in 2018 (still being sold to this day), and they're garbage....Not even close! Bags are a fail! Military surplus ammo can with watertight lid gasket removed and grommet holes added for wire access. A reliable battery safe. I keep a smoke detector and a pair of welders gloves close by. https://batteryhookup.com/products/...3284258&pr_seq=uniform&variant=35691145101474
Harbor Freight has a pretty good deal on 50 call ammo cans as well...

I have two issues: First is that 2 of my batteries are about 15.5" long, and every time I come across an ammo can, it's 12" or under in length, so I was thinking of using metal tool boxes (1 for each).
The second issue is heat. Metal is a great conductor of heat, so if you DO have a battery go into meltdown mode, the heat from the metal can cause it's own issues. I was considering buying a fire blanket as a liner, but then came across this video where an RC guy builds his own fireproof case using a tool box as well...
Essentially, he uses (probably Type X) drywall as an insulation layer. This is going to be my next project, once I get the drywall.