[eagle]

Years ago I bought a junk box at an auction that had a few little bottles of I think it was called "Battery In a Bottle" or something like that. When a battery started to get weak I'd pull off a little water out of the cells then add the bottle. It would rejuvenate a battery and I'd get sometimes a couple more years out of them. I haven't seen it for years although you do see a possibly similar product for golf cart batteries. I know there was lots of snake oil for battery rejuvenation sold back in the day, but some worked.