I carry a fire extinguisher in the truck and and keep one at the house, got them both at estate sales. A 3lb in the truck and a 5lb in the house
When I first went to Nashville I worked at a temp place and was sent to help at a construction site, just an office clean-out and drywall, I think they did new doors too, I was just cleaning up and goofing around. There was a 10lb extinguisher there that just sat on the floor and got moved around from time to time. I asked once about it and he didn't know what they'd do.
One day late in the game he said get that thing out of here, so I put it in the trunk, took it home, and lugged it around for almost 20 years.
I was on a nature trail build of a walk bridge and got my shoulder messed up, and during recovering I did volunteer at a handicap and wheelchairs. The guy I was helping there once recharged extinguishers and one day at the house I drug that out and he looked it over good, banged on it awhile with a rubber mallet, turned it every which way shaking it around.
He reached the conclusion it was caked up in there and wouldn't work, it was almost 40 by then I guess
When I was moving back to Oklahoma and trying to clean the place up I had been living 8 years I kept wondering what to do with that fire extinguisher. Couldn't throw it into scrap metal, didn't want to throw it in the dump, wasn't sure what to do
I took it over the side of a slope below the house and pulled the pin, squeezed the lever and that thing spewed powder for ten minutes, maybe more, but I hated that it had such an ending