How to Replace the Battery in an AirTag

Apple's AirTag is designed to be low-maintenance — but the battery won't last forever. The good news is that replacing it is a straightforward process that requires no tools and takes about 30 seconds. Here's exactly how it works, what battery you need, and the few variables that might affect your experience.

What Battery Does an AirTag Use?

AirTags use a CR2032 lithium 3V coin cell battery — one of the most common battery sizes in the world. You'll find CR2032s at grocery stores, pharmacies, electronics retailers, and online. They're inexpensive and widely available, so stocking a few spares makes sense if you run multiple AirTags.

One important caveat: some CR2032 batteries are coated with a bitter anti-ingestion coating (a child safety measure). Apple has confirmed that certain bitterness-coated CR2032 batteries may not make proper electrical contact inside the AirTag, causing it to fail or not be recognized at all. This isn't universal — it depends on the specific battery brand and coating thickness — but it's worth being aware of if your AirTag doesn't respond after a swap.

When Does the Battery Need Replacing?

Apple estimates AirTag battery life at roughly one year under typical usage. Your actual mileage varies depending on:

• How frequently the AirTag is pinged — actively searching for a lost item drains the battery faster than passive tracking
• Precision Finding usage — the U1 chip used for Precision Finding is power-hungry compared to standard Bluetooth beaconing
• Environmental conditions — extreme cold reduces lithium battery efficiency noticeably
• Background update frequency — how often nearby devices in the Find My network detect and relay your AirTag's location

Your iPhone will notify you when an AirTag battery is low via the Find My app. You can also check battery status manually: open Find My → Items tab → tap your AirTag → the battery indicator appears below the item name.

Step-by-Step: How to Replace an AirTag Battery 🔋

The AirTag uses a twist-off design — no screwdrivers, no prying tools required.

1. Remove the back cover Place the AirTag with the stainless steel side facing up (the shiny metal side). Press down firmly with two or three fingers and rotate counterclockwise. The cover will release after a short turn — roughly a quarter twist.

2. Remove the old battery Lift the stainless steel back cover off. The CR2032 battery sits exposed in the housing. It will likely pop out on its own or can be tipped out with a fingernail.

3. Insert the new battery Place the new CR2032 with the positive side (+) facing up — the side printed with the battery type and brand information. You'll hear or feel a slight click as it seats.

4. Reattach the cover Align the three tabs on the stainless steel cover with the slots on the white plastic housing. Press down and rotate clockwise until it locks. If you've seated it correctly, the cover sits flush with no wobble.

5. Confirm it's working Your AirTag should play a chime when the battery makes contact — this is normal and confirms the connection. If no sound plays, remove the battery and reseat it, checking that the positive side is facing up.

What If the AirTag Isn't Recognized After Battery Replacement?

If your iPhone doesn't detect the AirTag or the Find My app still shows a low battery warning after replacement, a few things could be causing it:

The bitterness coating issue is genuinely the most common culprit when a brand-new battery doesn't work. If you're experiencing this, switching to a battery without that coating typically resolves it immediately.

Does Battery Brand Matter?

For most users, any reputable CR2032 from a recognizable brand works fine — Panasonic, Energizer, Duracell, and Sony are commonly used without issues. Generic or deeply discounted batteries may have inconsistent contact quality or lower capacity, which can shorten the replacement cycle.

The coating issue mentioned earlier is the primary reason some users report battery failures. It's not about battery quality in the traditional sense — a coated battery from a premium brand can fail just as easily as one from an off-brand. The variable is the coating itself, not the overall battery quality.

How Battery Replacement Fits Into Your AirTag Routine

For someone tracking a single bag or set of keys, one battery swap per year is minimal effort. If you're managing four or more AirTags across multiple items, building a reminder system — or checking the Find My app periodically — prevents them from going dead at inconvenient moments. AirTags don't warn you that far in advance; the low battery notification typically appears when there are a few weeks of life remaining, not months.

The replacement process itself scales simply: same battery, same steps, same 30-second procedure regardless of how many AirTags you're maintaining.

What varies is how quickly any individual AirTag depletes — and that depends almost entirely on how that specific tag is being used, where it's being used, and how densely populated the Find My network is in your area. Two people running identical AirTags can see meaningfully different battery life based on those factors alone. 🔍