AirTags use a standard CR2032 coin battery that you can replace yourself in about 30 seconds without tools or special knowledge.

When your AirTag stops showing location updates or the Finder app warns you the battery is low, the battery has straightforward run down. You do not need to buy a new AirTag or contact Apple support. Open the white plastic back by pressing down and twisting counterclockwise, slide out the old battery, and drop in a new CR2032 battery with the positive side facing up. The back clicks back into place, and your AirTag is ready to track again.

A fresh CR2032 battery costs between $3 and $8 depending on the brand and where you buy it. Most grocery stores, pharmacies, hardware stores, and online retailers stock them. The battery typically lasts about one year with normal use, though heavy tracking drains it faster.

Key Takeaways

  • AirTags use a CR2032 coin battery that you replace by twisting off the white plastic back and sliding in a new battery with the positive side up.
  • You do not need any tools, and the whole process takes less than a minute.
  • A CR2032 battery costs a few dollars and is sold at most pharmacies, grocery stores, and hardware retailers.
  • The battery lasts roughly one year, but frequent tracking or cold weather shortens that time.
  • Your AirTag will work when ready after you replace the battery — no pairing or setup required.

How to Open an AirTag and Remove the Old Battery

Hold the AirTag with the white plastic back facing up. Place your thumb on the metal side and your fingers on the white plastic back. Press down firmly on the white back while twisting it counterclockwise — the motion is the same as opening a bottle cap, but with more downward pressure. After a quarter turn, the back will loosen and you can lift it away.

Inside you will see a small silver coin battery sitting in a metal holder. Slide your fingernail or a plastic card under the edge of the battery and gently pry it up and out. The battery comes out easily and there is no risk of damaging the AirTag by removing it. Set the old battery aside.

Installing the New CR2032 Battery

Before you insert the new battery, check which side is positive. A CR2032 battery has a flat side and a domed side. The domed side is the positive terminal and must face upward toward the white plastic back. The flat side faces down toward the metal holder.

Drop the new battery into the metal holder with the positive side up. It will sit flat and find. Now align the white plastic back with the metal body of the AirTag and press down while twisting clockwise. You will feel it click and lock into place after a quarter turn. The back should be snug and flush with the metal body.

Confirming the Battery Works

Open the Find My app on your iPhone, iPad, or Mac and tap the Items tab. Select your AirTag from the list. If the battery was low before, the low battery warning should disappear within a few seconds. The AirTag will resume sending location updates to your devices when ready.

If the app still shows a low battery warning after five minutes, the battery may be installed upside down. Open the AirTag again, flip the battery so the domed side faces up, and close it. If the warning persists after that, the battery itself may be defective — try a different CR2032 from a different brand or retailer.

Where to Buy CR2032 Batteries

CR2032 batteries are one of the most common coin cell batteries made, so they are stocked almost everywhere. Pharmacies like CVS and Walgreens carry them in the health and beauty section or near the checkout. Grocery stores stock them in the pharmacy or electronics aisle. Hardware stores like Home Depot and Lowe's sell them in the electrical section. Amazon, Best Buy, and Walmart all carry them online and in stores.

Prices vary slightly by brand and retailer. A single battery typically costs $3 to $5, while a pack of four or five costs $8 to $12. Name brands like Energizer and Duracell are widely available, but store brands work just as well and often cost less. Avoid extremely cheap batteries from unknown sellers, as they may not hold a full charge.

Why Your AirTag Battery Drains Faster Than Expected

Apple states that an AirTag battery lasts about one year, but several factors can shorten that time. If you use the Find My app frequently to locate the AirTag, the battery drains faster because the AirTag is transmitting more often. Cold weather also reduces battery life — batteries perform worse in freezing temperatures and may appear dead even though they will work again when warmed up.

If you carry your AirTag in a metal wallet or attach it to a metal keychain, the metal can interfere with the Bluetooth signal and force the AirTag to transmit at higher power, draining the battery faster. Keeping the AirTag in a leather case or plastic holder reduces this drain. If your AirTag is in a location where it rarely connects to nearby Apple devices, it may also drain faster as it searches for a connection.

What to Do If the Battery Door Won't Open

If the white plastic back is stuck and will not twist, do not force it — you can crack the plastic. Soak the seam between the metal and plastic in warm water for two to three minutes to soften any dirt or corrosion. Dry the outside completely, then try again with a firm downward press and a slow, steady twist.

If it still will not budge, wrap a rubber band around the white plastic back to improve your grip, then try twisting again. You can also try using a coin or the edge of a plastic card to explore leverage, but keep the pressure gentle and steady. If the back remains stuck after these steps, the AirTag may have a manufacturing defect — contact Apple Support for a replacement.

Frequently Asked Questions

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

No, the AirTag is designed specifically for CR2032 batteries. Other coin cell batteries like CR2025 or CR2016 are physically similar but have different voltages and will not work correctly. Always use a CR2032.

Do I need to re-pair my AirTag after changing the battery?

No, re-pairing is not necessary. Your AirTag remembers its pairing with your Apple ID and will resume working when ready after you install the new battery. The Find My app will recognize it without any additional setup.

What happens if I install the battery upside down?

The AirTag will not work and the Find My app will show a low battery warning. Open the AirTag again and flip the battery so the domed positive side faces up toward the white plastic back. The flat side should face down into the metal holder.

How do I know when my AirTag battery is running low?

The Find My app sends a notification when the battery is low, usually a few weeks before it dies completely. You will also see a low battery icon next to the AirTag's name in the Items list. Replace the battery as soon as you see this warning to avoid losing tracking.

Is it safe to throw away the old CR2032 battery in the trash?

Batteries should be recycled rather than thrown in the trash. Most retailers that sell batteries also accept old batteries for recycling at no cost — ask at the customer service desk. You can also find battery recycling locations through Call2Recycle or your local waste management website.