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Half of my AirTags are on 1.0.301 and the others are on 2.024. All in the same house all purchased on the same day. So not expecting a big rush to get them all updated if they even will update.
 
I'm on my third CR2032 in mine, which was purchased on the first day they were available, so 1.5 years. Both times I replaced the battery within a few days after I start seeing battery warnings. I'd say the batteries last about 6-9 months on average.
In all three of my AirTags, the batteries entirely stopped working about half a year(!) after the battery warning, some days apart (I started using them the same day). All in all, I had 1,5 years of work (05/2021 - 11/2022) for all my Tags' (original, Apple-supplied) batteries.

Entirely stopping working means "Find my" stopped updating their position and just displayed the last position when the battery still operated. That is, one can easily see when a battery is indeed dead, which - in my case - was around half a year after the warning's start.

That is, there's no need to hurry exchanging the batteries when the warning appears.
 
All depends on how often you use them. Have some that are over a year old but I've also never had to ping them.

Makes sense. I do tend to use the ping feature every 1-2 weeks or so (every time I'm looking for my keys!). I also tend to stick it in my checked luggage when I travel and have fun with the tracking feature.
 
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Apple: We have new firmware for AirTags!
Customer: Cool, what's new in the firmware?
Apple: We may or may not tell you at some point. But you should install it.

Only Apple.
Seriously? You apparently haven't looked at the state of release notes on the App Store lately. Some provide proper details, but so many now say, "Bug fixes and performance improvements" along with some flowery language about caring about users and keeping them up to date every few weeks (which is just a PR way of saying they're doing two week sprints and this latest release is the result of the most recent sprint, and they can't be bothered to copy/paste in the list of things they fixed).
 

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There is no word yet on what's included in the update, but Apple may provide a support document with details.
Yes, yes Apple should. If I have purchased one, I should know exactly what is included in any update, especially when there is no opt in or out! Transparency, remember Apple?
 


Apple today released a new firmware update designed for its AirTag item trackers, with the firmware featuring an updated build number of 2A36, up from the 2A24e firmware that Apple started releasing in November. Note that when you install the update, you will see a 2.0.36 version number.

AitTag-New-Firmware.jpg

There is no word yet on what's included in the update, but Apple may provide a support document with details.

It is not possible to force an AirTag update, as it's something that's done over-the-air through a connected iPhone. To make sure the update happens, you can put your AirTag in range of your ‌iPhone‌, but you have to wait for the firmware to roll out to your device. You can check your current AirTag firmware version through the Find My app, with instructions available in our how to.

Curiously, Apple started providing the prior 2A24e AirTags firmware on a rolling basis in November, but ultimately pulled the update before it saw a full launch. The new firmware released today replaces that version.

Article Link: Apple Releases AirTags Firmware Update
My tags both at 2.0.24
 
I have 3 AirTags on 3 devices. I've had them about a year

I just checked their firmware:

1.0.291 --- haha and this one seems to think my device is across town...
IMG_7A6EA3F9E19D-1.jpeg

1.0.301
1.0.301

Awesome lol
 
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In all three of my AirTags, the batteries entirely stopped working about half a year(!) after the battery warning, some days apart (I started using them the same day). All in all, I had 1,5 years of work (05/2021 - 11/2022) for all my Tags' (original, Apple-supplied) batteries.

Entirely stopping working means "Find my" stopped updating their position and just displayed the last position when the battery still operated. That is, one can easily see when a battery is indeed dead, which - in my case - was around half a year after the warning's start.

That is, there's no need to hurry exchanging the batteries when the warning appears.
This is my experience too.

I am reusing the partially depleted batteries from my Ikea motion sensors in my AirTags because while they are too weak for the sensors they are still strong enough for the AirTags.

Ps I’ll also note that the chirp sound the tag makes when you install the battery is proportional to the battery strength, so you can use it as a de facto battery tester (the charge icon used to do that too but was removed except to show a low state.).

I’ve never seen using the tag as a battery tester like this reported anywhere.
 
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