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A 10-Year Battery for AirTag

(www.elevationlab.com)
673 points dmd | 1 comments | 18 Dec 24 18:17 UTC | HN request time: 0s | source
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q3k ◴[20 Dec 24 16:09 UTC] No.42472279[source]▶
My $0 version:

https://object.ceph-eu.hswaw.net/q3k-personal/5143b5491fca11...

Usually wrapped in electrician's tape.

1. NRF52 board from some scrap given by a friend, running forked/ported OpenHaystack firmware

2. AA battery holder from junk box

3. AA batteries from junk drawer

If my math is correct, this should last until AA self-discharge, ie. around 10 years. Yes, it works with Apple's FindMy network. Yes, I've flown with it.

replies(1): >>42472676 #
1. stanmancan ◴[20 Dec 24 16:55 UTC] No.42472676[source]▶
I guess anything could be a $0 version if you just happen to have all the parts already.