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A 10-Year Battery for AirTag

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673 points dmd | 2 comments | 18 Dec 24 18:17 UTC | HN request time: 0.021s | source
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esaym ◴[19 Dec 24 21:25 UTC] No.42465817[source]▶
> we recommend Energizer Ultimate Lithium

The advantage of "lithium" is high rate discharge, not longevity right?

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cr3ative ◴[19 Dec 24 21:37 UTC] No.42465935[source]▶
I think in this case it’s shelf life. Very little discharge for a very long time.
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1. esaym ◴[19 Dec 24 22:13 UTC] No.42466267[source]▶
Doing some math, looks like a CR2032 is roughly 200mah while AA is 2000mah. So if CR2032 lasts one year, then the AA will be 10 years, two AA would be 20 years. I guess in that case lithium would be the way to go.

I just know for your typical wall clock that takes a single AA, whether it is lithium or alkaline, both won't make it much further than a year.

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2. ascorbic ◴[20 Dec 24 07:16 UTC] No.42468961[source]▶
These have 3500mAh capacity: https://data.energizer.com/pdfs/l91.pdf