I unboxed one of those AirTag accessories that sounds slightly ridiculous until you think about the use case properly: an Apple AirTag enclosure replacement that runs on 2 AA batteries instead of the usual CR2032 coin cell.
And yes, I know. It makes the AirTag bigger. This is not the sleek little disc you hide elegantly in a wallet. This is the version you chuck into luggage, cable-tie to a kick scooter, or throw into a laptop bag and then forget about until Future You needs it. Honestly, Future You deserves nice things.
The unboxed kit: enclosure, AA battery compartment, screws, tool, adhesive bits, and the usual small parts designed to disappear if you sneeze.
What this thing actually is
The product is basically a rugged AirTag enclosure that replaces the normal button-cell battery setup with a larger battery compartment for two AA batteries. The packaging claims waterproofing, AA battery support, and more flexible mounting options.
The box calls it an ultra-long battery life extender for AirTag. Big claim, but the battery math is not nonsense.
The appeal is simple: AirTags are brilliant until you need to keep replacing CR2032 cells. Apple’s official claim is “more than a year” of battery life, but real-world use can be shorter, especially if you make the AirTag play sounds often. I have seen people mention closer to 6-12 months depending on usage, which is fine for keys, less fine for things you don’t want to keep opening up.
The battery math, because of course I did the battery math
A typical CR2032 coin cell is around 220-240 mAh at 3V. Let’s use 235 mAh as a reasonable middle number.
A decent AA lithium battery can be around 3000 mAh at 1.5V. Two AA batteries in series give you roughly 3V, which matches the AirTag’s expected voltage range better than one AA alone. When batteries are in series, voltage adds, but capacity in mAh stays roughly the same.
So the simplified comparison looks like this:
- CR2032: about 235 mAh at 3V
- 2x AA lithium in series: about 3000 mAh at 3V
- Capacity ratio: 3000 / 235 = about 12.8x
If Apple says the AirTag can last about 12 months on a CR2032, then the very optimistic theoretical number becomes:
12 months x 12.8 = 153.6 months, or about 12.8 years.
That is the “spreadsheet is feeling generous” number. Real life will be worse because batteries have self-discharge, voltage curves are messy, contact resistance exists, weather matters, and electronics never read your calculations before disappointing you. But even if we haircut that down quite aggressively, a claim of just over 10 years theoretically is not crazy when using good lithium AA batteries.
With alkaline AA batteries, the numbers can still be much better than CR2032, but I would be more cautious. Alkalines are cheaper, but they are also more likely to leak if left alone for years. And if this thing is going into luggage or a bag you don’t inspect often, battery leakage is exactly the sort of quiet betrayal that ruins your day later.
Use lithium AA batteries if you can
My practical advice: if you are buying this for long-term placement, use good AA batteries, preferably lithium. The whole point of the product is to stop thinking about the battery. Saving a few dollars on bargain-bin alkalines and then discovering battery leak gunk in your tracker years later feels like losing at a game nobody told you was running.
Where I would actually use this
Fully assembled, it is definitely no longer tiny. But for luggage, scooters, and bags, that is not really the point.
This is not for every AirTag use case. I would not put this in a slim wallet. I probably would not use it on keys unless I wanted my keychain to look like it had a side job.
But for these, I get it:
- Checked luggage
- Cabin bags
- Kick scooters
- Laptop bags
- Tool bags
- Storage boxes you only touch once in a while
Basically, anything where size is less important than “please keep working without making me remember another tiny battery purchase”.
The trade-off
The trade-off is obvious: it makes the AirTag much bulkier. But that bulk buys you a much larger energy reserve, better mounting options, and less battery anxiety. For luggage and gear tracking, that is a trade I can live with.
Would I use this for every AirTag? No. Would I use it for the AirTag I intend to forget inside a bag for a very long time? Absolutely.
View the AirTag AA battery extender on Shopee
Affiliate note: some links may be affiliate links. If you buy through them, I may earn a small commission at no extra cost to you. This helps fund the very serious scientific pursuit of buying oddly useful things and then doing battery math on them.
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