AirTag Battery Replacement: Why Your Holder Decides How Annoying It Is

Once a year, give or take. Apple states that an AirTag works for more than a year on a standard battery, and your iPhone tells you when it is time.

The swap itself takes about thirty seconds. What turns thirty seconds into ten minutes and a bad mood is the thing you keep the tag in, which is why this is worth reading before you choose a holder rather than after.

Key Takeaways

• Apple's stated figure is more than a year on one CR2032, with an alert on your iPhone when it runs low.
• The cover is a bayonet fitting. Press down, rotate counterclockwise, and it releases. Three tabs align with three slots on the way back.
• A correctly seated battery makes a sound. If you do not hear it, the battery is not connected.
• Some bitterant-coated CR2032 cells do not work in an AirTag. Apple says to look for packaging stating compatibility with Apple AirTag.
• A swallowed coin cell can cause internal chemical burns within two hours. This matters more than usual on an object that lives on a keyring around children and pets.
• Your holder's closure sets the annual cost of all this. Decide how much security you want before you commit to a yearly chore.

How Often Does an AirTag Need a New Battery?

Apple's own wording is that AirTag works for more than a year on a standard battery you can replace when your iPhone alerts you. The specification footnote adds that battery life is based on everyday average usage of playing sound and Precision Finding, and varies with usage, environment and battery manufacturer.

Read that footnote as an instruction rather than a disclaimer. The two things that drain the cell are the two things you deliberately do to it. A tag you ping every day is not on the same schedule as one that sits in a suitcase between holidays.

You do not need to track it. When the charge drops, a notification appears on your iPhone. You can also check on demand: open Find My, tap Items, tap the tag, and Low Battery appears under its name if it needs replacing.

How Do You Change an AirTag Battery?

Apple's procedure has four steps and needs no tools.

1. Press down on the polished stainless steel cover and rotate it counterclockwise until it stops rotating.
2. Remove the cover and the battery.
3. Insert a new CR2032 lithium 3V coin battery with the positive side facing up. You will hear a sound confirming the battery is connected.
4. Replace the cover, aligning the three tabs with the three slots, then rotate clockwise until it stops.

If you hear nothing on step three, take the battery out and put it back. A cell that is upside down, misaligned, or coated in a way the contacts do not like will sit there silently and report low charge forever.

The Battery That Does Not Work, and Why

This is the part almost nobody knows until it happens to them.

Coin cells are a serious ingestion risk for small children, so manufacturers add a bitter-tasting coating to discourage swallowing. Apple recommends using one, naming the Duracell 2032 Lithium Coin Battery with Bitter Coating as an example.

The catch is in Apple's own sentence: some CR2032 batteries with bitterant coatings might not work with AirTag or other battery-powered products. The coating can sit between the cell and the contact.

Apple's instruction is to look for packaging that states it is compatible with Apple AirTag. Do that at the shop rather than at home, because the failure looks exactly like a dead battery.

So if you have just fitted a brand new cell and the tag still reports low battery, you probably have not bought a faulty battery. You have bought a coated one the contacts cannot read.

Coin Cell Safety, Which Matters More on a Keyring

We would rather over-explain this than leave it out of an article about an object people clip to a child's bag.

Apple's warning on the battery page is direct. A swallowed button or coin battery can cause internal chemical burns in as little as two hours, and death or serious injury can occur if ingested. Apple also notes that the AirTag, the cover and the battery may each present a choking hazard.

Three practical consequences:

• Change the battery away from children and pets, over a surface where a dropped cell cannot roll out of sight.
• Dispose of the old cell immediately and properly. A used coin cell still holds enough charge to cause harm.
• Choose a holder that stays shut if the tag is going anywhere near a small child. A closure that pops open under a curious hand is a different risk from one that loses you a tracker.

That last point is the reason we build the closures the way we do, and the honest version of a sales argument we could have made much more loosely.

How Your Holder Decides Whether This Is Thirty Seconds or Ten Minutes

You will do this roughly once a year for as long as you own the tag. Over a decade that is ten times, which is enough to matter.

Closures fall into four groups, and each carries a different annual cost:

• Stretch fit. Fastest to open, and the same softness that makes it fast is what eventually stops it holding the tag. You pay for the convenience over years rather than minutes.
• Snap fit. A few seconds with a fingernail. Reasonable, unless the shell has gone brittle, at which point the yearly opening is what breaks it.
• Threaded closure. Half a minute and sometimes a coin. Our v2.0 sits here, and the annual battery change is the natural moment to check the screw is still tight.
• Captive closure. You take the keyring off first, so it is the slowest. Our v3.0 works this way, and the extra minute once a year is the price of a tag that cannot fall out for the other 364 days.

If a yearly minute sounds like a bad trade, take the easy-access route without guilt. Our v1.0 is the quickest of ours to open. We lay out the security side of the same decision in the holder materials comparison.

One thing to avoid entirely: a holder that has to be cut, unstitched or forced to release the tag. Anything sewn permanently shut is a one-year product wearing the clothes of a lifetime one.

What to Check While the Holder Is Open

You have it apart once a year anyway. Four things take another minute and catch problems early.

1. The stitching around the opening. This is where thread wears first, because it takes the load every time you open it. A loose end caught now is a repair; ignored, it is a hole.
2. The ring or clip. Look at where the metal passes through the leather. Wear shows as a widened, glazed hole before it shows as a failure.
3. The closure itself. On a screw, tighten it. On a stretch fit, close it and shake it hard at head height for five seconds. Movement you can feel is a warning.
4. The leather, if it has been wet. Stiff, dark patches mean it dried too fast. Never dry leather near a radiator or a hairdryer; there is no repair for that.

If it needs conditioner, use it sparingly and test on a hidden area near the back stitch line first. Over-oiling softens the fibre until the recess stops gripping, which turns a good holder into a loose one.

Frequently Asked Questions

How long does an AirTag battery last?

Apple states more than a year on a standard battery. The figure assumes everyday average use of playing sound and Precision Finding, so heavy use shortens it and a tag left alone in a bag lasts longer.

What battery does an AirTag use?

A CR2032 lithium 3V coin cell, user-replaceable, available from most electronics and pharmacy shops. Apple ships one installed.

Why does my AirTag say low battery after I replaced it?

Most often the cell is not connected. You should hear a sound when it seats correctly. If you fitted a bitterant-coated battery, Apple notes some of those do not work with AirTag, so check the packaging says it is compatible.

Which way up does the AirTag battery go?

Positive side facing up, towards you, as you drop it in.

Do I need to remove my holder to change the battery?

Yes, on any fully enclosed holder. How long that takes depends on the closure, which is worth thinking about before you buy rather than eleven months afterwards.

Can I take a spare AirTag battery on a plane?

In your carry-on only. The FAA requires spare lithium batteries to travel in the cabin with the terminals protected against short circuit. We cover the travel rules in our luggage guide.

The Short Version

Once a year, press and twist the steel cover counterclockwise, drop in a CR2032 positive side up, listen for the sound, and align the three tabs on the way back. If you hear nothing, the battery is not connected, and a bitterant coating is the usual culprit.

Everything else about this job is decided by the holder. A closure that keeps the tag in for a decade costs you an extra minute once a year, and that is the trade worth making deliberately rather than by accident.

Our leather AirTag holders are cut from full grain hide in our Istanbul workshop, and all three open without tools. Both generations of the tag use the same battery and the same cover.

Sources

1. Apple, How to replace the battery in your AirTag. support.apple.com — retrieved 11 August 2026.
2. Apple, AirTag product page, battery life statement. apple.com — retrieved 11 August 2026.
3. Apple, AirTag (2nd generation) — Tech Specs. support.apple.com — retrieved 11 August 2026.
4. Federal Aviation Administration, PackSafe: Batteries, lithium metal and lithium ion, citing 49 CFR 175.10(a)(18). faa.gov — retrieved 11 August 2026.