AirTag Battery Life and Replacement: How Often, How To, and What Low-Battery Alerts Mean

Quick answer: Apple states AirTag battery life at up to roughly one year under typical use, powered by a standard, widely available CR2032 coin-cell battery — not a proprietary or rechargeable pack. Replacement takes under a minute once you know the mechanism, and costs a few dollars for the battery itself. A dog's AirTag may drain somewhat faster than Apple's typical-use estimate if it's frequently out of range of the Find My network and searching harder for a connection, so treat the one-year figure as a general guide, not a guarantee.

How to replace an AirTag battery

1. Remove the AirTag from its holder first.
2. Press down on the stainless steel back (the polished side, not the white plastic side) while rotating it counter-clockwise — it takes a reasonable amount of firm pressure, which is intentional, to prevent accidental opening.
3. Once the back rotates far enough, it will lift off, revealing the battery underneath.
4. Remove the old CR2032 battery and insert the new one with the positive (+) side facing up, matching the original orientation.
5. Replace the back, press down, and rotate clockwise until it clicks back into place.
6. You'll hear a short chime confirming the AirTag has powered back on — if you don't hear it, the back may not be fully seated; try again.

What battery to buy

A standard CR2032 lithium coin-cell battery is what an AirTag uses — this is a very common battery size, widely available at supermarkets, pharmacies, hardware stores, and electronics retailers across Australia, not a specialty item you need to specifically source. Buying a genuine, reputable brand rather than the cheapest unbranded option is a reasonable precaution, since coin-cell battery quality and actual capacity can vary between manufacturers.

Why a dog's AirTag might drain faster than expected

Apple's stated "up to a year" battery estimate is based on typical use patterns. A few factors specific to using an AirTag on a dog can affect actual battery life:

• Frequent searching for a connection in lower-device-density areas can use more power than an AirTag that's consistently near iPhones — the device works harder trying to establish a Bluetooth connection when one isn't readily available.
• Temperature extremes can affect coin-cell battery performance and longevity, and a collar-worn AirTag spends more time in variable outdoor temperature than one in a bag or on keys.
• Frequent use of Precision Finding uses more power during active use, though brief searches have a negligible cumulative effect compared to the battery's overall lifespan.

None of this means dramatically shorter battery life is typical — most owners report battery life reasonably close to Apple's estimate — but it's worth checking battery status periodically rather than assuming exactly 12 months from installation.

How to check battery status

Open the Find My app, tap the "Items" tab, select your dog's AirTag from the list, and the battery status will be shown — typically as "Battery OK" under normal conditions, changing to a low-battery indicator as it depletes. You don't need to guess; the app tells you directly.

What a low-battery alert means (and what to do)

When an AirTag's battery gets low, Find My will send a notification (assuming notifications are enabled) and the app will show a low-battery warning. This isn't an emergency — the AirTag will typically continue functioning for some time after the first low-battery warning — but it's a genuine prompt to replace the battery soon, since a fully depleted AirTag stops reporting location entirely, at exactly the moment you might need it.

A practical habit: replace the battery as soon as you see the low-battery notification, rather than waiting until it's fully dead. Keeping a spare CR2032 at home means this becomes a two-minute task rather than something that gets deferred for weeks.

A simple maintenance routine

• Check battery status in the Find My app every couple of months, rather than only when a notification appears — notifications can occasionally be missed or delayed.
• Keep a spare CR2032 battery at home so replacement isn't held up by needing to buy one.
• While the AirTag is out of its holder for a battery change, it's a good moment to also check the holder itself for any wear, cracking, or a closure that's become less secure over time.
• After replacing the battery, confirm you hear the chime and check the Find My app shows the AirTag as active before putting it back on the collar.

FAQs

Can I use a rechargeable battery instead of a standard CR2032? Apple's AirTag is designed around a standard, replaceable CR2032 coin cell — it isn't designed for a rechargeable pack, and using a non-standard battery type isn't recommended.

How do I know if my AirTag's battery is actually dead versus just out of range? Check the Find My app's battery status directly — if it shows the AirTag as active with an OK or low-battery status, it's a range/connectivity issue, not a dead battery. If the app shows no recent activity and a low or critical battery warning, replacement is likely needed.

Does cold weather affect AirTag battery life? Coin-cell batteries generally perform somewhat less efficiently in cold temperatures, though this is a minor factor for most Australian conditions compared to device-density-related power drain.

Is it normal for the battery to last less than a year on a dog's collar? It can happen, particularly if your dog spends significant time in lower-device-density areas, but most owners report battery life reasonably close to Apple's stated estimate — check status periodically rather than assuming a fixed replacement date.

A quick battery check is also a good moment to check your holder's seal. See how Pawfetchers works.