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jojothe junkman

Post subject: Tarnished like old silver

Posted: Wed Dec 10, 2025 7:16 pm

Joined: Thu Jan 27, 2022 10:27 pm
Posts: 19

What am I looking at here. Have not come across these before

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20251210_180751.jpg [ 2.86 MiB | Viewed 557 times ]

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marked141

Post subject: Re: Tarnished like old silver

Posted: Wed Dec 10, 2025 10:07 pm

Joined: Sat Nov 29, 2014 9:44 pm
Posts: 1505
Location: I'm right here :D

Hmm...

Initial reaction is some kind of battery but I have no idea. Would be curious to see a couple other angles of it if you are up for adding more photos.

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jojothe junkman

Post subject: Re: Tarnished like old silver

Posted: Wed Dec 10, 2025 10:37 pm

Joined: Thu Jan 27, 2022 10:27 pm
Posts: 19

Will get more pics in the morning.

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Catwhisker

Post subject: Re: Tarnished like old silver

Posted: Thu Dec 11, 2025 5:12 am

Joined: Mon Apr 15, 2024 9:38 pm
Posts: 146

Reminds me of a typical nickel cadmium battery stack. Probably is. The corrosion on the left terminal is typical of that type of battery. Should be a B indication near it on the PCB itself. It is 3 nicads cells welded in series to get approximately 3.6 volts. Enough voltage to maintain memory circuits for the PCB when powered down or even removed from the device it is in. If it has some silver plate on it. I wouldn't be surprised. Dispose of properly. Or recycle.
Here to learn like everybody else.

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jojothe junkman

Post subject: Re: Tarnished like old silver

Posted: Thu Dec 11, 2025 7:57 am

Joined: Thu Jan 27, 2022 10:27 pm
Posts: 19

B501 on the pcb as suspected

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