Apple AirTag batteries last about one year under normal use

An Apple AirTag uses a standard CR2032 coin cell battery that typically lasts around one year before it needs replacement. The exact length depends on how often you use the Find My app to locate the tag, how far away you are when you search, and whether you have the tag in a high-traffic area where it's constantly communicating with nearby Apple devices.

When the battery gets low, your iPhone will send you a notification saying the battery needs to be replaced. At that point, you have a small window—usually a few weeks—before the tag stops working entirely. The battery doesn't die suddenly; it fades gradually, so you'll notice the tag becoming less responsive to searches before it stops working completely.

Key Takeaways

  • A CR2032 battery in an AirTag lasts approximately one year with typical daily use.
  • Your iPhone sends a low battery notification when replacement is needed, giving you time before the tag stops working.
  • Frequent location searches and constant Bluetooth communication drain the battery faster than occasional use.
  • Replacing the battery costs just a few dollars and takes less than a minute—you don't need to buy a new tag.
  • The battery replacement process is straightforward enough that you don't need tools or technical knowledge.

What affects how long your AirTag battery lasts

The one-year estimate assumes you're using your AirTag in a typical way—checking its location occasionally and keeping it in a normal environment. If you search for your tag multiple times a day or live in an area with many Apple devices nearby, your battery will drain faster because the tag is constantly broadcasting its location.

Temperature also plays a role. CR2032 batteries perform worse in cold environments, so if you keep your AirTag in a car during winter or carry it outside in freezing weather regularly, you may see shorter battery life. Storing your AirTag in a warm, dry place helps the battery last longer.

The type of AirTag holder you use can matter too. Some third-party cases are thicker or made of materials that trap heat, which can slightly reduce battery life. Apple's official leather and silicone holders don't significantly affect performance.

How to know when your AirTag battery is running low

Your iPhone will display a notification on the Find My app when the battery reaches a low level. This notification appears in the app itself and may also show as a system alert, depending on your notification settings. The warning typically comes when there's still two to four weeks of battery life remaining, giving you time to plan a replacement.

You can also manually check the battery status by opening the Find My app, tapping the Items tab, selecting your AirTag, and looking at the battery percentage shown at the top of the screen. This percentage updates whenever your AirTag communicates with nearby Apple devices, so it may take a few minutes to refresh if you haven't used the tag recently.

How to replace an AirTag battery

Replacing the battery takes less than a minute and requires no tools. Hold the AirTag with the polished stainless steel side facing up. Press down on the battery cover—the white plastic circle on the back—and twist it counterclockwise until it stops. The cover will pop off, and the old battery will come out with it.

Drop the new CR2032 battery into the empty slot with the positive side (marked with a plus sign) facing up. Replace the cover by pressing it down and twisting it clockwise until you hear a click. Your iPhone should recognize the fresh battery within a few seconds and update the battery percentage in the Find My app.

CR2032 batteries are inexpensive and widely available at drugstores, supermarkets, electronics retailers, and online. A single battery typically costs between one and three dollars. You can buy them in bulk if you have multiple AirTags, since they all use the same battery type.

Why you shouldn't ignore a low battery warning

Once the battery dies completely, your AirTag stops communicating with the Find My network. You won't be able to locate it using your iPhone, and if you lose the physical tag, you have no way to find it. The tag becomes essentially useless until you replace the battery.

A dead AirTag can still be located by other people's iPhones if it's in a crowded area, but you won't receive those location updates. This is why it's important to replace the battery as soon as you get the low battery notification rather than waiting until the tag stops working.

Comparing AirTag battery life to other tracking devices

The one-year battery life of an AirTag is typical for small Bluetooth tracking tags. Tile trackers, which work on a similar principle, also last around one year. Some GPS-based trackers last longer but are bulkier and more expensive. Bluetooth tags like AirTags are designed to be small and lightweight, which means they use smaller batteries that need more frequent replacement.

The trade-off is worth it for most people: AirTags are thin enough to slip into a wallet or attach to a keychain without adding noticeable bulk, and the annual battery replacement is a minor inconvenience compared to the convenience of having a working tracker at all times.

Frequently Asked Questions

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

No, you should only use a CR2032 battery. Other battery types won't fit properly or may damage the tag. CR2032 is a standard size, so you have many brands to choose from, but the type must be CR2032.

What happens if I don't replace the battery right away?

The tag will continue to work for a few weeks after the low battery warning, but performance will degrade. Eventually it will stop communicating with the Find My network entirely and become useless until you replace the battery.

Does using AirTag in Lost Mode drain the battery faster?

Yes, Lost Mode increases battery drain because the tag communicates more frequently with nearby devices. If you enable Lost Mode, expect the battery to last a few weeks rather than months.

Can I return an AirTag to Apple to have the battery replaced?

Apple does not offer battery replacement service for AirTags. You must replace the battery yourself, which is straightforward and takes less than a minute. If you're uncomfortable doing it, you can ask a friend or family member to help.

Is it normal for an AirTag battery to last less than a year?

If your battery dies significantly sooner than one year, it may be a defective battery or a problem with the tag itself. Try replacing the battery with a fresh CR2032 from a different brand. If the new battery also drains quickly, contact Apple about a possible replacement tag.