The battery in your AirTag slides out from the side, and you swap it for a fresh CR2032 coin cell battery—the same kind used in watches and calculators
AirTags use a single CR2032 battery that typically lasts about a year under normal use. When the battery runs low, your iPhone will send you a notification. The replacement takes about 30 seconds and requires no tools.
You do not need to remove the AirTag from its holder or case to change the battery. The battery compartment is accessible from the outside, and the whole process is designed so anyone can do it without opening the device.
Key Takeaways
- AirTags use a CR2032 coin cell battery, which you can buy at any pharmacy, grocery store, or online retailer for a few dollars.
- The battery compartment is on the flat side of the AirTag and opens by pressing and twisting the stainless steel ring counterclockwise.
- Your iPhone will notify you when the battery is low, but you can also check the battery status in the Find My app under the AirTag's details.
- The battery typically lasts about one year, though heavy use or cold weather can shorten that time.
Where to buy a CR2032 battery
CR2032 batteries are sold everywhere. You can find them at drugstores like CVS or Walgreens, supermarkets, hardware stores, and online at Amazon or eBay. A single battery costs between $2 and $5, and a pack of four or five costs $5 to $10. Do not buy the cheapest option if the brand is unfamiliar—stick with Energizer, Duracell, Panasonic, or Sony.
If you are in a hurry, a pharmacy counter or grocery store checkout will have them in stock. If you order online, the battery will arrive in a few days. Keep a spare CR2032 on hand so you are not caught without a working AirTag.
How to open the battery compartment
Hold the AirTag with the flat, polished side facing up. You will see a stainless steel ring around the edge of that flat side. Press down on the ring with your thumb or finger and twist it counterclockwise (to the left) about a quarter turn. The ring will pop up slightly.
Once the ring pops up, lift it away from the AirTag. The white plastic battery cover will come out with it. You now have access to the battery compartment. The old battery will be sitting in the circular recess, with the positive side (marked with a +) facing up toward you.
Removing the old battery and installing the new one
Pry the old battery out with your fingernail or a plastic tool. Do not use a metal tool, as it can damage the compartment. The battery should come out easily. If it is stuck, try tilting the AirTag slightly so gravity helps.
Take your new CR2032 battery and check the orientation. The positive side (marked with a +) should face up, toward the white plastic cover. Slide the new battery into the circular recess, positive side up. It will sit flat and snug in the compartment.
Closing the AirTag and confirming the battery works
Place the white plastic battery cover back into the AirTag, making sure it sits flat. Press the stainless steel ring down and twist it clockwise (to the right) until you hear or feel a click. The ring should be flush with the flat side of the AirTag when it is fully closed.
Open the Find My app on your iPhone and tap the AirTag. Scroll down to the battery section. You should see "Battery: Good" or a percentage reading. If the battery status does not update right away, wait a few seconds and refresh the app. The AirTag will now work normally until the battery runs low again, usually in about a year.
What to do if the battery compartment is stuck
If the stainless steel ring will not twist, do not force it. The ring can be tight on a new AirTag. Try wrapping a rubber band around the ring to improve your grip, then twist gently. You can also try holding the AirTag under warm (not hot) running water for a few seconds to loosen any manufacturing residue.
If the ring still will not budge after a gentle attempt, stop and contact Apple Support. Forcing the ring can crack the plastic underneath or strip the threading. Apple can open it for you or replace the AirTag if something is wrong with the mechanism.
Disposing of the old battery safely
Do not throw a used CR2032 battery in the trash. Coin cell batteries contain lithium and can pose a fire risk in landfills or recycling trucks. Most pharmacies and electronics stores have battery recycling bins near the checkout or customer service desk. You can also search for a local battery recycling location at Call2Recycle.org.
If you have no recycling option nearby, you can store the old battery in a safe place until you have several to drop off. Keep it away from metal objects that could short the terminals.
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 of battery will not fit the compartment or will damage the AirTag. Stick with CR2032 only.
How do I know when the battery is actually dead?
Your iPhone will send you a notification when the battery is low. The Find My app will also show "Battery: Low" in the AirTag details. Once the battery is completely dead, the AirTag will stop communicating with your iPhone and will not show up in Find My until you replace the battery.
Does the AirTag need to be removed from its case to change the battery?
No. Most AirTag cases and holders have a cutout or opening on the flat side that lets you access the battery compartment without removing the AirTag. If your case does not have an opening, you will need to slide the AirTag out temporarily.
What happens to my AirTag location history when I replace the battery?
Replacing the battery does not erase any data or location history. Your AirTag will reconnect to your iPhone when ready after the new battery is installed, and all your settings and history remain the same.
Is it normal for the battery to only last a year?
Yes. Apple estimates about one year of battery life under normal use. If you use the AirTag heavily—checking its location frequently or using it in very cold weather—the battery may drain faster. A year is typical for most people.