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The battery has "Pb" written on it, so I assume it's lead battery.
Lead ain't that dangerous. Just take it out and dispose of it like you do with normal batteries. Clean your hands afterwards and you're dandy. As for the clock, the battery contacts, and whatever they were attached to, are likely eaten away, but I can't say that for certain from this photo. If you're lucky and they're mostly intact, some IPA scrubbing and a dip in vinegar, and a bit more scrubbing, should take most of the crust away. That rust though, probably some vinegar, maybe a deoxidating agent (like navy jelly?) could clean it off. Even cleaning all of it doesn't guarantee that it'll work any way.
^ I second this comment. Lead is only bad if you eat it or it somehow gets injected into your body. Wear gloves if you're worried.
But it's so sweet and yummy
Just led me ead my lead bro mmm
What photo? I’ve been looking for one
This post has a photo in the summary. Is your client (if any) not displaying it, maybe?
Probably not.
I can’t find the direct link that would take me off myinstance and to the home one.
An alternative would be to replace the movement.
Could be easier than fussing with the contacts.
Bingo. I fixed or built clocks with these exact units.
And you made me realize I can do this with an antique General Electric clock! It's 120V and whines like mad, can't get it right.
After you have cleaned it all (as the other comments explained already) and put a new battery in there, it is possible that the electric contacts are still not clean enough (especially the left one with that deep rust) and it doesn't work with the new battery.
Then you have to go at the contacts with a small file or a small piece of sanding paper and scratch them very good, so that they get really very shiny right there in the middle, where it counts. Then it will work again.
Just don't lick the residue and you'll be just fine
As long as the decorative side isn’t affected, it should be fine (and that’s only an esthetic thing anyway).
Just clean it up and try to get as much residue out of the back as you can. The easiest thing to do is just throw out the whole clock mechanism and replace it (very, very easy), but if you don’t want to do that, and the mechanism itself isn’t affected, you could probably just buy a new battery enclosure with the same battery capacity as the original, and wire it to the same connections the original batteries had.
Perfectly right, and the only thing I would add is take the battery to your city’s hazardous waste recycling thing, don’t just throw it in the trash can
Just clean it up. Wear gloves and a mask to prevent anything getting in your body. Just be careful about what cleaning products you use to prevent releasing dangerous gasses and do it in a ventilated room or outside. But I would recommend that for any battery or strong acid or base or other reactive chemicals, not just lead containing ones.
