How to Change the Battery in an Apple AirTag
Apple AirTags are designed to be low-maintenance — but they're not zero-maintenance. Eventually, every AirTag will need a fresh battery, and knowing how to swap it correctly keeps your tracker running without missing a beat. The good news: Apple made this process genuinely user-friendly, requiring no tools and taking less than a minute once you know the steps.
What Battery Does an AirTag Use?
AirTags run on a CR2032 lithium 3V coin cell battery — one of the most common battery types in the world. You'll find them at pharmacies, electronics stores, supermarkets, and online retailers. Apple rates a single battery to last approximately one year under typical use, though real-world life varies depending on how frequently the AirTag is pinged, whether Precision Finding is used often, and how active your local Find My network is.
One important detail: some CR2032 batteries have a bitter-tasting coating (bitterant) applied to discourage children from swallowing them. These coated batteries can interfere with the AirTag's battery contacts and prevent the device from powering on. Apple specifically recommends using CR2032 batteries without a bitterant coating. Check the packaging before purchasing — this trips up a lot of people who assume any CR2032 will work.
How Your iPhone Tells You It's Time 🔋
Before the battery dies completely, your iPhone will alert you. AirTags communicate their battery status through the Find My app. When the battery is running low, you'll receive a notification, and the AirTag's listing in Find My will show a low battery indicator. You don't need to guess — the system tells you.
If an AirTag goes completely silent and stops appearing as reachable in Find My, a dead battery is often the first thing to check.
Step-by-Step: Changing the AirTag Battery
The AirTag uses a simple press-and-twist mechanism to open. No screwdrivers, no prying tools, no adhesive to deal with.
What you'll need:
- A replacement CR2032 coin cell battery (without bitterant coating)
- Your fingers
Steps:
Hold the AirTag with the white plastic side facing down and the stainless steel back facing up toward you.
Press down firmly on the stainless steel back with two or three fingers, then rotate it counterclockwise — about a quarter turn. You'll feel and hear a slight click as it releases.
Lift off the stainless steel cover. The battery sits right on top inside the housing, held loosely in place by a small clip.
Remove the old battery by popping it out. Note which side faces up — the positive (+) side should face upward toward you when inserting the new one.
Drop the new CR2032 in with the positive (+) side facing up. You should hear a single chime from the AirTag, confirming it has powered on and recognized the battery.
Replace the stainless steel cover by lining up the tabs and rotating it clockwise until it clicks and locks into place.
That's it. No pairing required — the AirTag remembers its association with your Apple ID automatically.
What the Chime Tells You
That single chime when you insert the battery isn't just a startup sound — it's a confirmation signal. If you don't hear the chime, the battery likely isn't making proper contact. This is usually caused by:
- A bitterant-coated battery interfering with the contacts
- The battery inserted upside down (negative side up)
- A dead or faulty replacement battery
- Debris or corrosion on the battery contacts
If no chime plays, remove the battery, inspect the contacts, and try again with a verified uncoated CR2032.
Factors That Affect How Often You'll Replace the Battery
Not every AirTag user replaces batteries at the same interval. Several variables determine real-world battery life:
| Factor | Lower Battery Drain | Higher Battery Drain |
|---|---|---|
| Find My pings | Infrequent location checks | Frequently pinged or searched |
| Precision Finding | Rarely used | Used often to locate items |
| UWB activity | Minimal nearby iPhone interaction | Regular close-range detection |
| Temperature | Stored in moderate climates | Exposed to extreme cold or heat |
| AirTag age | Newer unit | Older unit with aging contacts |
Cold temperatures in particular can reduce coin cell battery output temporarily — a tracker left in a car during winter may report low battery sooner than expected, then recover slightly when warmed.
Keeping Track Across Multiple AirTags
If you own several AirTags — attached to keys, bags, luggage, a pet's collar — it's worth periodically checking the Find My app to audit battery status across all of them at once. Each AirTag listed in the app displays its current battery level. Staggering battery replacements across your devices prevents multiple trackers from dying around the same time.
Some users keep a small supply of CR2032 batteries at home specifically because the replacement is so fast and simple that it makes sense to swap on-demand rather than making a separate shopping trip.
When a Battery Swap Doesn't Fix the Problem
A fresh battery resolves the vast majority of AirTag issues. But if your AirTag still won't chime, won't appear in Find My, or behaves erratically after a battery change, the issue may lie elsewhere — firmware, hardware, or a pairing problem that has nothing to do with power. In those cases, Apple's support documentation and the Find My troubleshooting flow are the right next steps.
How often you actually replace your AirTag's battery, which CR2032 brand works best with your unit, and whether a single year of battery life fits your tracking habits — those answers depend entirely on how and where you're using your AirTags in practice.