this post was submitted on 16 Oct 2024
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Electronics

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Opened an old scientific instrument to see if it works... (lemmy.ca)
submitted 2 weeks ago by troyunrau@lemmy.ca to c/electronics@discuss.tchncs.de
51 comments fedilink hide all child comments
 

Instrument is a Geonics EM16 VLF receiver, using in the mineral exploration industry to find buried linear conductors.

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[–] ch00f@lemmy.world 1 points 2 weeks ago* (last edited 2 weeks ago) (3 children)

~~Fun Fact: batteries only do this when they're over-discharged. If you design your circuit right, this won't happen.~~

[–] troyunrau@lemmy.ca 29 points 2 weeks ago (1 children)

These batteries are in a circuit which has a physical power switch separating it from the device, meaning there should be zero parasitic drain while off.

Thus I conclude your fun fact to be apocryphal.

[–] ch00f@lemmy.world 9 points 2 weeks ago (1 children)

Guess the Duracell rep lied to us. Sorry.

[–] troyunrau@lemmy.ca 4 points 2 weeks ago

Duracell rep might be a sales robot. Or possibly talking about another type of battery? Anyway, points for learning :)

[–] cmnybo@discuss.tchncs.de 17 points 2 weeks ago (1 children)

Then why have I had Duracells leak in an unopened package before the expiration date?

[–] thesohoriots@lemmy.world 8 points 2 weeks ago (1 children)

I hate Duracell for this reason. Thank god we finally got decent rechargeables.

[–] lightnsfw@reddthat.com 2 points 2 weeks ago

Duracell suck but Kirkland are so much worse. Rechargeable Eneloops are the way to go.

[–] Ptsf@lemmy.world 9 points 2 weeks ago (1 children)

That doesn't make sense. Every alkaline cell suffers from this due to the formation of hydrogen gas inside the cell over its lifespan, as well as corrison caused by the chemistry of the cells themselves. It's not specifically driven by the charge of the cell; although that is certainly a contributing factor and poorly designed circuits will exhibit more wear on the cell causing more rapid corrison & gas formation.