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14 votes

What battery chemistry is suitable for a "time capsule" applicaton?

The longest operating battery: https://en.wikipedia.org/wiki/Oxford_Electric_Bell No exotic chemistry required, but it's very effectively insulated so as to prevent self-discharge.
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avoid Li-Ion batteries explosion

1) Do the first test with a battery simulator. Don't connect it to a real battery until you're sure it's working as expected. simulate this circuit – Schematic created using CircuitLab Set R1 …
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