An AirTag battery lasts about one year under normal use
Apple's AirTag uses a standard CR2032 coin cell battery that typically runs for one year before the battery drains completely. The actual lifespan depends on how often you trigger the speaker, play sounds to locate the tag, or use the Find My app to check its location. Heavy use — playing sounds multiple times daily — can shorten battery life to eight or nine months. Light use can stretch it closer to 14 months.
You will know the battery is running low when the Find My app sends you a notification. The notification appears on your iPhone, iPad, or Mac when the battery drops to around 10 percent capacity. At that point, you have a few weeks of use left before the tag stops working entirely. Apple does not provide a precise "days remaining" counter, so the notification is your signal to plan a replacement.
Key Takeaways
- A CR2032 battery in an AirTag lasts approximately one year under typical use, though heavy use of the speaker feature can reduce this to eight or nine months.
- The Find My app notifies you when the battery reaches about 10 percent, giving you time to replace it before the tag becomes inactive.
- Replacing the battery takes less than a minute — you pop off the back of the tag, remove the old battery, and insert a new CR2032 coin cell.
- CR2032 batteries cost between $3 and $8 for a pack of multiple batteries at most retailers, making replacement inexpensive.
- The battery cannot be recharged; AirTag is designed for single-use, replaceable batteries only.
What drains an AirTag battery fastest
The speaker inside the AirTag consumes the most power. Every time you play a sound to locate the tag — either through the Find My app or by pressing the button on your iPhone — the battery drains a small amount. If you use this feature once or twice a week, battery life stays close to one year. If you use it daily or multiple times daily, expect the battery to last eight to ten months instead.
Bluetooth communication also draws power, but at a much lower rate. The tag broadcasts its location to nearby Apple devices constantly, but this background activity uses minimal energy. Location checks through the Find My app consume slightly more power than passive broadcasting, but the difference is small enough that most users will not notice a significant impact on battery life.
Temperature can affect battery performance. Extreme cold slows chemical reactions inside the battery and may cause it to drain faster or report lower capacity than it actually has. Extreme heat can also reduce lifespan. Normal indoor and outdoor temperatures have minimal impact on the one-year estimate.
How to replace an AirTag battery
Replacement is straightforward and requires no tools. Hold the AirTag with the white side facing up. Press down on the stainless steel back cover and rotate it counterclockwise until it stops — usually a quarter turn. The cover will pop off, and the battery will be visible inside.
Remove the old CR2032 battery by lifting it out of the slot. Insert a new CR2032 battery with the positive side (marked with a +) facing up. Press the stainless steel cover back onto the tag and rotate it clockwise until it clicks into place. The Find My app will clear the low battery notification within a few minutes once the new battery is installed.
The entire process takes less than one minute. No pairing or setup is required after battery replacement — the AirTag will resume working when ready with the same Find My account it was already connected to.
Where to buy replacement CR2032 batteries
CR2032 batteries are widely available at drugstores, supermarkets, electronics retailers, and online. Common sources include CVS, Walgreens, Target, Best Buy, and Amazon. A pack of two to four batteries typically costs between $3 and $8, depending on the brand and retailer. Store brands are chemically identical to name brands and work just as well in an AirTag.
Some retailers sell batteries individually for $1 to $2 each, which is useful if you only need one replacement when ready. Buying in bulk is more economical if you own multiple AirTags or expect to replace batteries regularly over time.
Signs your AirTag battery needs replacement soon
The Find My app notification is the clearest signal. When you see the low battery alert, plan to replace the battery within the next week or two. The tag will continue to work after the notification appears, but the battery will drain completely within a few weeks.
If the AirTag stops responding to location requests or the speaker produces no sound when you try to play a tone, the battery may be completely dead. In this case, replacement is the only fix — there is no way to recharge a CR2032 battery or extend its life once it is fully depleted.
Can you recharge an AirTag battery
No. AirTag uses a non-rechargeable CR2032 coin cell battery. There is no charging port, no wireless charging capability, and no way to restore power to a dead battery. Apple designed AirTag specifically for battery replacement, not recharging. Once the battery is depleted, you must remove it and install a new one.
This design choice keeps the AirTag thin, lightweight, and waterproof. Adding a rechargeable battery and charging mechanism would require a larger case and a charging port, both of which would compromise the tag's compact form factor and water resistance rating.
Comparing battery life across different use patterns
| Use Pattern | Estimated Battery Life | Speaker Use Per Week |
|---|---|---|
| Light use | 12 to 14 months | Once or less |
| Typical use | 10 to 12 months | 2 to 4 times |
| Heavy use | 8 to 10 months | Daily or more |
| Very heavy use | 6 to 8 months | Multiple times daily |
These estimates assume normal indoor and outdoor temperatures and typical Bluetooth communication patterns. Actual results vary based on individual usage and environmental factors.
Frequently Asked Questions
Does the Find My app tell you exactly how many days the battery has left?
No. The app only sends a notification when the battery drops to around 10 percent capacity. It does not display a percentage or countdown timer. Once you receive the notification, you can expect a few weeks of remaining use before the battery is completely dead.
What happens if an AirTag battery dies while it is tracking something?
The tag stops broadcasting its location to the Find My network. If the item is lost, you will no longer be able to locate it through the app or see its last known location. This is why replacing the battery promptly after receiving the low battery notification is important if you rely on the tag for tracking valuable items.
Can you use a different type of battery in an AirTag?
No. AirTag is designed specifically for CR2032 coin cell batteries. Using a different battery type may damage the tag or cause it to malfunction. Always use a standard CR2032 battery rated for the same voltage (3 volts) as the original.
Does cold weather make an AirTag battery die faster?
Cold can temporarily reduce battery performance and cause the battery to report lower capacity than it actually has. However, the battery usually recovers when it warms up. Extreme cold may shorten overall lifespan slightly, but normal winter temperatures have minimal impact on the one-year estimate.
How much does it cost to replace an AirTag battery compared to buying a new tag?
A replacement CR2032 battery costs $3 to $8 for a pack of multiple batteries, or $1 to $2 per battery. A new AirTag costs around $29. Replacing the battery is far more economical and is the intended way to keep an AirTag working long-term.