The battery comes out from the back, and a fresh CR2032 costs a few dollars

An AirTag battery lasts about a year with normal use. When it dies, you do not need to buy a new AirTag — you just swap out the coin-cell battery inside. The whole job takes under a minute and requires no tools.

The battery is a CR2032, a standard coin-cell battery you can buy at any pharmacy, grocery store, or online. A pack of four costs between $3 and $8 depending on the brand. Once you have a fresh one, the AirTag will work again when ready.

Key Takeaways

  • AirTag batteries are CR2032 coin cells, available at drugstores and supermarkets for a few dollars.
  • The battery compartment is on the back of the AirTag and opens by pressing and twisting the metal ring counterclockwise.
  • The old battery comes out with your finger; the new one goes in with the flat side facing up.
  • Your phone will notify you when the battery is low, usually weeks before it actually dies.

How to open the battery compartment

Flip the AirTag over so you are looking at the back. You will see a stainless steel ring around the edge. Press down on the ring with your thumb and twist it counterclockwise — the direction opposite a clock's hands. It will turn about a quarter turn before it stops.

The white plastic disc inside will pop up slightly. Lift it out completely. The battery sits underneath, flat side up. You do not need a coin or any tool; your finger is enough pressure to twist the ring.

Remove the old battery and insert the new one

Tip the old battery out into your hand or a small dish. It is a thin silver disc about the size of a dime. If it is stuck, gently pry the edge with your fingernail.

Take your new CR2032 battery and place it in the compartment with the flat side facing up and the raised edge facing down. The battery will sit flat on its own — you do not need to press it in. Slide the white plastic disc back in on top, then press and twist the metal ring clockwise until it clicks. The ring will turn about a quarter turn and then stop.

What to do if the battery is stuck

If the old battery will not come out easily, do not force it. Tilt the AirTag so the compartment faces downward and tap the back gently against a hard surface. The battery should fall out.

If it is still stuck, try using a plastic spoon or the edge of a credit card to gently lift one side of the battery. Metal tools can scratch the compartment, so plastic is safer. Once one edge is up, your finger can flip it the rest of the way out.

How to know when the battery is running low

Your iPhone or iPad will send you a notification when the AirTag battery is low. The message appears in the Find My app and as a system alert. You typically get this warning weeks before the battery actually dies, so you have time to order a replacement battery or pick one up at a store.

If you ignore the notification and the battery dies completely, the AirTag will stop working. It will not send location data and will not make a sound if you ask Siri to find it. Replacing the battery brings it back to full function when ready.

Where to buy CR2032 batteries

CR2032 batteries are one of the most common coin-cell types and are stocked almost everywhere. Pharmacies like CVS and Walgreens carry them in the battery aisle. Supermarkets usually stock them near the checkout or in the health and beauty section. Amazon and other online retailers sell them in bulk packs, which is cheaper per battery if you have multiple devices that use them.

Brand does not matter much for basic use. Duracell, Energizer, and store brands all work fine in an AirTag. A single battery costs $1 to $2 at a pharmacy; a pack of four online costs $3 to $8. Keep a spare on hand if you use multiple AirTags.

Troubleshooting: AirTag still not working after battery change

If you have replaced the battery and the AirTag still does not work, make sure the battery is inserted correctly. The flat side must face up and the raised edge must face down. If you put it in backwards, it will not make contact. Open the compartment again and flip the battery over.

If the battery is in the right way and the AirTag still does not respond, the battery itself may be defective. Try a different CR2032 from a different pack or brand. If a second battery also does not work, the AirTag hardware may be damaged and replacement is the only option.

Frequently Asked Questions

Can I use a different battery size in my AirTag?

No. AirTag is designed for CR2032 batteries only. Other coin-cell sizes like CR2025 or CR2016 will not fit the compartment or make proper contact. Always use CR2032.

How long does a CR2032 battery last in an AirTag?

About one year with normal use. The exact length depends on how often you check the AirTag's location and how many times you play its sound. Heavy use shortens battery life; light use may extend it slightly.

What happens if I put the battery in backwards?

The AirTag will not work. The battery must have its flat side facing up. If you insert it upside down, the contacts will not align and no power will reach the device. Open the compartment and flip the battery over.

Is it safe to replace the battery myself?

Yes. There are no sharp edges, no electrical risk, and no special tools needed. The battery compartment is designed for user replacement. Wash your hands after handling the old battery, as with any used battery.

Can I recycle the old CR2032 battery?

Yes. Most pharmacies and electronics stores have battery recycling bins near the entrance or customer service desk. You can also check Earth911.com or Call2Recycle.org to find a drop-off location near you. Do not throw batteries in the trash.