AirTags run on a replaceable battery, not a rechargeable one

AirTags do not charge. They use a standard CR2032 coin cell battery that you replace when it runs out, the same type found in watches, calculators, and car key fobs. Apple designed them this way intentionally — a rechargeable battery would add weight, bulk, and complexity to a device meant to slip into a pocket or attach to a keychain.

The battery lasts about one year under normal use. Apple's definition of "normal" means locating your AirTag a few times per week through the Find My app. If you search for it constantly, the battery drains faster. If you barely use it, it lasts longer.

When the battery gets low, your iPhone sends you a notification. At that point, you have a few weeks before it stops working entirely. Replacing it takes about 30 seconds and costs $2 to $5 for a new CR2032 battery at any pharmacy, grocery store, or electronics retailer.

Key Takeaways

  • AirTags use a replaceable CR2032 battery that lasts roughly one year with typical use.
  • You will receive a low-battery notification on your iPhone before the AirTag stops working.
  • Replacement batteries cost $2 to $5 and are available at most stores that sell batteries.
  • Swapping the battery takes about 30 seconds and requires no tools or technical knowledge.

How to replace an AirTag battery

Hold the AirTag with the white side facing up. Press down on the stainless steel back cover and twist it counterclockwise about a quarter turn until it stops. The cover will pop off, and you will see the battery sitting in a small compartment.

Lift out the old battery and drop in a new CR2032 with the positive side (the side with the + symbol) facing up. Press the cover back on and twist it clockwise until you hear a click. That click tells you it is seated properly.

Your iPhone will recognize the new battery within a few seconds. If it does not, toggle Bluetooth off and back on in your settings. The AirTag is now ready to use for another year.

Why Apple chose a replaceable battery

A rechargeable battery would require a charging port, a charging cable, and a larger case to house the electronics. All of that would make an AirTag heavier and thicker — defeating the purpose of a device designed to be invisible in your wallet or clipped to your keys.

The CR2032 is one of the most common batteries in the world. You can find it at a gas station at midnight or a grocery store on a Sunday. A rechargeable AirTag would tie you to a specific charging cable and force you to remember to charge it regularly, which defeats the "set it and forget it" design philosophy.

This trade-off means you have a small maintenance task once a year instead of a charging routine. Most people find that a fair exchange.

What affects how long the battery lasts

The Find My network uses Bluetooth to locate your AirTag. Every time your iPhone or another Apple device nearby searches for it, the AirTag uses a tiny amount of battery power. If you search for your AirTag multiple times per day, the battery drains noticeably faster than if you search once a month.

Temperature also plays a small role. Batteries perform worse in very cold conditions, so an AirTag left in a freezing car will drain faster than one kept at room temperature. This is temporary — the battery recovers when it warms up.

The age of the battery itself matters too. A CR2032 battery sitting on a shelf for five years will not hold a full charge as well as a fresh one. When you buy replacement batteries, check the manufacturing date on the package if you want maximum lifespan.

Comparing AirTags to other tracking devices

Most other Bluetooth trackers on the market — like Tile, Samsung SmartTags, and Chipolo — also use replaceable batteries. Some offer rechargeable versions, but those require charging every few weeks or months. The trade-off is the same: convenience versus the occasional battery swap.

GPS trackers, which work differently and provide real-time location rather than Bluetooth proximity, almost always require regular charging because GPS drains power much faster. If you need constant location tracking for a vehicle or pet, a rechargeable GPS device makes sense. For everyday items like keys and wallets, the replaceable-battery approach is more practical.

What to do if your AirTag stops working

If your AirTag stops responding in the Find My app, the battery is almost certainly dead. Replace it using the steps above. If you have already replaced the battery and it still does not work, make sure the battery is inserted with the positive side facing up — this is the most common mistake.

If the battery is in correctly and the AirTag still does not respond after a few minutes, the device itself may be faulty. Apple offers a one-year warranty on AirTags. Contact Apple Support with your proof of purchase, and they can replace it.

Frequently Asked Questions

Can I use a different type of battery in my AirTag?

No. AirTags are designed specifically for CR2032 batteries. Using a different size or type will not fit, and forcing it could damage the device. Stick with CR2032 replacements.

How do I know when the battery is running low?

Your iPhone sends a notification when the battery reaches about 10 percent. You will see a message in the Find My app saying the battery is low. You typically have two to four weeks after this notification before the AirTag stops working.

Is it safe to replace the battery myself?

Yes. The battery replacement is straightforward and safe. There are no electrical risks, and the device has no moving parts that can be damaged. You do not need any tools or special knowledge.

What happens if I lose an AirTag before the battery dies?

If someone else finds your AirTag, they can see your contact information on their iPhone. The battery will continue to work in their hands until it dies, at which point they can replace it or discard it. Your AirTag will no longer be useful to you once it is out of your possession.

Can I buy AirTags with the battery already installed?

Yes. New AirTags come with a fresh CR2032 battery already inside. You do not need to install anything before using it — just open the Find My app and follow the pairing steps.