No gun that is for self defense should left like that.
I’m thinking about a specific case in San Francisco, back in the nineties. A guy who’d bought a .38 special in the forties, who’d last fired in in the sixties, and last cleaned it in the eighties, found a drug-crazed lunatic breaking in his door with a crowbar and a machete.
The revolver worked.
Any firearm I keep for self-defense will receive better care than that, but it will also be something that I have confidence in working without care, our I’d not keep it.
I will not own a firearm that requires batteries to function.