How to Change the Battery in an AirTag

Apple's AirTag uses a standard, user-replaceable battery — no tools, no special skills, no trip to a store. But if you've never done it before, the mechanism can feel a little unintuitive the first time. Here's exactly how the process works, what battery to buy, and what factors affect how long you'll go between replacements.

What Battery Does an AirTag Use?

AirTag runs on a CR2032 lithium coin cell battery — the same flat, round battery found in key fobs, watches, and countless other small electronics. Apple rates the battery life at approximately one year under typical use, though that figure shifts depending on how often the AirTag is actively pinged and how frequently it connects via Bluetooth.

One important note: some CR2032 batteries have a bitter-tasting coating (added as a child safety measure). Apple's original AirTag design was not compatible with these coated batteries because the coating interfered with the electrical contacts. Apple addressed this in a firmware update, but if you're buying replacement batteries, it's worth checking the packaging. Batteries labeled "bitter coating" or "child-safe coating" may work on updated AirTags, but uncoated CR2032s remain the safest and most reliable choice.

How to Open an AirTag and Replace the Battery 🔋

The AirTag doesn't open with a latch or a screwdriver. It uses a press-and-twist mechanism on the stainless steel back cover.

Step-by-step process:

1. Hold the AirTag with the white side down — the polished silver back faces up.
2. Press down firmly on the metal back with two or three fingers. You need consistent, even pressure across the surface.
3. Rotate counterclockwise while pressing. You'll feel a slight click and the cover will loosen after about a quarter-turn.
4. Lift off the metal back to expose the battery compartment.
5. Remove the old CR2032 battery — it sits in a shallow tray with no clip holding it in.
6. Insert the new battery positive side up (the "+" symbol faces you).
7. Replace the metal back, align the tabs, press down, and rotate clockwise until it locks.

You should hear a chime from the AirTag confirming the battery connection. If you don't, the battery may not be seated correctly, or the contacts may need a gentle clean.

What Can Make This Harder Than Expected

The twist mechanism is the most common friction point. If the back doesn't seem to catch or turn, a few things may be happening:

• Insufficient pressure: You need to press down before rotating, not just twist. The tabs only disengage under downward force.
• Slippery surface: Doing this on a hard, flat table helps. Some people use a rubber mat or even a jar lid for grip.
• Case interference: If your AirTag is in a holder or accessory case, you may need to remove it from the case first. Some third-party holders grip the steel back in a way that complicates the twist.

Closing it back up can also feel uncertain. The cover has three alignment tabs that need to line up before the lock engages. If it's not catching, rotate it back slightly, re-align, and try again.

How Long Should a Battery Last? ⏱️

Apple's one-year estimate is a reasonable baseline, but it's not universal. Battery life varies based on:

AirTags in luggage that rarely gets opened will drain more slowly than AirTags on a dog collar that's scanned and located multiple times per week. The battery percentage is visible in the Find My app under the item's detail view — it shows Low Battery as a warning rather than a percentage, so you won't see a precise readout until it approaches depletion.

Will a Generic CR2032 Work?

Yes — AirTag is not locked to Apple batteries or any specific brand. Generic CR2032 cells from reputable brands work fine, provided they're uncoated or confirmed compatible. The battery is a standard IEC specification, not a proprietary format.

That said, cell quality varies between manufacturers. Budget no-name cells may have shorter shelf lives or less stable voltage curves than branded alternatives. Since you're only replacing the battery once every year or so, spending a few extra cents on a known brand is usually worth it — but the choice depends on what's accessible and what you're comfortable with.

What Happens If You Use the Wrong Battery?

Inserting a battery with the negative side up is the most common mistake — the AirTag won't power on, but no damage is done. Simply flip it and reinsert.

Using a different coin cell format (like a CR2016 or CR2025) won't work. They're similar in diameter but different in thickness, and won't make proper contact or fit correctly in the housing. The CR2032 is the only correct format.

Your Setup Is the Missing Piece

Battery replacement on an AirTag is one of the more straightforward hardware tasks Apple has built into its product lineup. The mechanism, the battery spec, and the process are consistent across every AirTag. But how often you'll need to do it — and whether factors like your case, your climate, or your usage pattern affect the experience — depends entirely on how and where you're using yours.