General > General Technical Chat
30 year old AA cells
andy2000:
One advantage of the old zinc carbon cells is that they don't contain large amounts of liquid to leak out. They're good for low drain test equipment like a VOM. Alkalines tend to leak before they run down in low drain applications.
SilverSolder:
Interesting, so perhaps it is time to let zinc-carbon cells in from the cold, as an alternative to expensive lithium batteries? (obviously, alkaline is firmly on the "Uninvited" list!)
@rt:
That’s so cool! In my childhood in Australia, the text was different, but we had the same logo and black cat with the nine (lives I guess).
I came close to seeking these out for photography for retro toys, but I’m less interested in the collecting lately.
Circlotron:
--- Quote from: @rt on September 22, 2020, 10:54:04 am ---That’s so cool! In my childhood in Australia, the text was different, but we had the same logo and black cat with the nine (lives I guess).
--- End quote ---
Yep. Sparky the cat getting hit in the bum with a lightning bolt. ;)
Buriedcode:
I'll just add another datapoint to the zinc carbons lasting ages - as in shelf life. Found a pack of C cells in my garage from the mid 90's. 1.48V. I have never seen them leak, but I believe they do have very limited capacity as well as relatively high internal resistance.
The most modern instance I have seen them was with what came with an Omron blood pressure monitor. I'm not sure why they shipped them as its a relatively high drain application.
They are also used in battery adverts as a marketing comparison "lasts 4 times longer! *"
*when compared to zinc carbon
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