Replace the battery by twisting the stainless steel back off, removing the old CR2032 coin cell, and inserting a new one

An AirTag uses a single CR2032 coin cell battery, the same type found in watches, calculators, and car key fobs. When the battery runs low, your iPhone will send you a notification. To replace it, you twist the stainless steel back cover counterclockwise until it comes loose, lift out the old battery, drop in a new CR2032, and twist the cover back on clockwise until you hear a click. The whole job takes about 30 seconds.

You do not need any tools, and you do not need to pair the AirTag again after you replace the battery. The device will resume working when ready. A fresh CR2032 typically lasts about one year under normal use, though battery life varies depending on how often the AirTag transmits location data.

Key Takeaways

  • AirTags use CR2032 coin cell batteries, which you can buy at any drugstore, supermarket, or online retailer for $3 to $8 per battery.
  • Twist the stainless steel back counterclockwise to open the battery compartment; do not pull or pry.
  • You do not need to re-pair or reset the AirTag after replacing the battery — it will work when ready.
  • A new CR2032 battery lasts approximately one year before you will receive another low-battery notification.

Where to buy a CR2032 replacement battery

CR2032 batteries are sold everywhere. Walgreens, CVS, Target, and Walmart all stock them in the pharmacy or electronics section. Amazon, Best Buy, and other online retailers carry them as well. A single battery costs between $3 and $8 depending on the brand and where you buy it. You can also buy multipacks of 4 or 5 batteries for $10 to $15 if you own multiple AirTags or other devices that use the same battery type.

Look for the label "CR2032" or "DL2032" — both names refer to the same battery. Avoid buying the cheapest option if the seller has no reviews; counterfeit coin cell batteries exist and perform poorly. Reputable brands include Energizer, Duracell, Panasonic, and Sony.

The step-by-step replacement process

Step 1: Locate the seam. Hold the AirTag with the white plastic side facing up. You will see a thin seam running around the edge where the stainless steel back meets the plastic. This is where the cover twists off.

Step 2: Twist counterclockwise. Place your thumb on the stainless steel back and twist it counterclockwise (the same direction you would unscrew a jar lid). explore steady pressure — you do not need to force it. After a quarter turn or so, the back will loosen and you can lift it off by hand. Do not pull straight up; twist first, then lift.

Step 3: Swap the battery. Inside the compartment you will see the old CR2032 battery sitting flat in a small circular holder. Lift it out with your fingernail or a plastic spoon. Drop the new battery in with the positive side (marked with a + symbol) facing up. The battery should sit flat and level in the holder.

Step 4: Close the cover. Place the stainless steel back on top of the AirTag, aligning the seam. Twist it clockwise until you hear or feel a click. The cover should be snug but you do not need to crank it hard. If it does not click after a full turn, remove it and check that the battery is sitting flat in the holder.

What to do if the battery is stuck or the cover won't open

If the stainless steel back is difficult to turn, try wrapping a rubber band around it for better grip, then twist again. A rubber band gives your thumb more traction without scratching the metal. If the cover still will not budge, place the AirTag on a flat surface and press down gently with the heel of your hand while twisting with your other hand.

Do not use pliers, a wrench, or any metal tool on the cover — you will damage the finish and may crack the plastic underneath. If you cannot open it after several attempts, the cover may be defective. Contact Apple Support and describe the problem; they can arrange a replacement AirTag.

Signs your AirTag battery is running low

Your iPhone will display a notification that says "AirTag Battery Low" or similar language when the battery has about 10 percent charge remaining. You will see this alert in the Find My app or as a push notification on your lock screen. At this point, you have a few days to a week before the battery dies completely, so you do not need to replace it when ready.

If you ignore the notification and the battery dies, the AirTag will stop sending location updates and will not make a sound when you press the button. Replacing the battery will restore full function right away. There is no risk of damaging the AirTag by letting the battery drain completely.

How long a CR2032 battery lasts in an AirTag

A new CR2032 battery typically lasts about one year in an AirTag under normal use. Battery life depends on how often the AirTag transmits data — if you use it to track a frequently-moved item like a set of keys or a backpack, the battery will drain faster than if you use it on something stationary like a suitcase or a pet collar.

Cold temperatures also reduce battery life slightly. If you store an AirTag in a freezer or leave it outside in winter, you may see the battery run low a few weeks earlier than expected. Once you replace the battery, performance returns to normal.

Frequently Asked Questions

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

No. AirTags are designed for CR2032 batteries only. Using a different size or type of battery will not fit in the compartment or may damage the device. Stick with CR2032 or DL2032 — they are the same battery with different names.

Do I need to reset my AirTag after replacing the battery?

No. The AirTag will resume working when ready after you close the cover. You do not need to re-pair it with your iPhone or perform any setup steps. If it does not appear in the Find My app after a few minutes, toggle Bluetooth off and on in your iPhone settings.

What should I do with the old battery?

Do not throw it in the trash. Most drugstores and supermarkets have a battery recycling bin near the customer service desk or pharmacy. You can also check Earth911.com or Call2Recycle.org to find a drop-off location near you. Batteries contain materials that can be recovered and reused.

Is it safe to replace the battery myself?

Yes. There are no sharp edges, no electrical hazard, and no risk of breaking the AirTag during a normal battery replacement. The CR2032 is a standard consumer battery and poses no danger. Millions of people replace these batteries in watches and other devices every day without incident.

Why is my AirTag battery draining so fast?

If a new battery runs low in a few weeks instead of a year, the AirTag may be transmitting more often than normal — this happens if you use it on a moving object or if Bluetooth is enabled constantly. Alternatively, the battery itself may be defective. Try a battery from a different brand or store. If the problem continues, the AirTag hardware may be faulty and you should contact Apple Support.