The airtag battery is one of the most convenient parts of Apple’s small tracking device because you do not need to recharge the AirTag every few days or weeks. Instead, AirTag uses a replaceable CR2032 coin-cell battery that can last for more than a year under normal use.
When the battery gets low, your iPhone can notify you, and you can also check the battery status through the Find My app. Replacing the battery does not require an Apple Store visit or special equipment.
The airtag battery system is designed to keep the tracker small while providing long-term operation. Apple says the AirTag works for more than a year on a standard replaceable battery.
In 2026, Apple also introduced the second-generation AirTag, which continues to use a user-replaceable CR2032 battery. The newer model keeps the same basic battery replacement concept while adding hardware improvements such as a second-generation Ultra Wideband chip and expanded Precision Finding capabilities.
So, whether you own the original AirTag or the newer model, understanding the airtag battery can help you avoid unexpected tracking interruptions.
This guide explains how long the battery lasts, how to check it, which replacement battery to buy, how to replace it, what to do when the AirTag still does not work, and how to get the best possible battery life.
Table of Contents
- What Is an AirTag Battery?
- How Long Does an AirTag Battery Last?
- What Battery Does AirTag Use?
- How to Check AirTag Battery Level
- How to Know When AirTag Battery Is Low
- How to Replace an AirTag Battery
- Which CR2032 Battery Should You Buy?
- Why Your AirTag Battery May Drain Faster
- What to Do After Replacing the Battery
- AirTag Battery Problems and Fixes
- AirTag Battery Safety
- Original AirTag vs AirTag 2 Battery
- Can You Recharge an AirTag Battery?
- How to Make Your AirTag Battery Last Longer
- Frequently Asked Questions
- Final Verdict
- SEO Details
What Is an AirTag Battery?
The airtag battery is a small CR2032 lithium 3V coin-cell battery located behind the stainless-steel battery cover.
Unlike devices such as AirPods or Apple Watch, AirTag does not have a rechargeable battery that you plug into a charger.
Instead, the battery is designed to be replaced when it becomes depleted.
This approach allows Apple to keep the tracker compact while avoiding the need to recharge it regularly.
The original AirTag uses a user-replaceable CR2032 battery, and Apple’s second-generation AirTag also uses a replaceable CR2032 coin cell.
The battery powers the AirTag’s electronic components, including its Bluetooth connectivity, speaker, accelerometer, and other tracking hardware.
Because the AirTag spends much of its time in a low-power state, the battery can last significantly longer than the batteries found in devices that continuously run a display or processor.
That is one of the reasons AirTag is convenient for everyday items such as:
- Keys
- Backpacks
- Luggage
- Wallets
- Camera bags
- Bicycle accessories
- Travel cases
- Other personal belongings
How Long Does an AirTag Battery Last?
One of the biggest advantages of the airtag battery is its long expected lifespan.
Apple says an AirTag works for more than a year on a standard battery that can be replaced by the user.
However, actual battery life can vary.
The exact lifespan depends on factors such as:
- How often the AirTag communicates
- Environmental conditions
- How frequently Precision Finding is used
- How often the speaker is activated
- Battery quality
- Temperature
- The overall condition of the battery
Therefore, you should treat Apple’s more-than-one-year figure as general guidance rather than a guarantee that every battery will last exactly the same amount of time.
A battery that lasts around a year can still be considered normal.
https://www.apple.com/airtag/
Does AirTag Battery Last Exactly One Year?
No.
The airtag battery does not have a fixed one-year expiration period.
Some users may get longer battery life, while others may need a replacement sooner depending on how the AirTag is used.
For example, an AirTag that is frequently involved in tracking activity may behave differently from one attached to an item that rarely moves.
The best approach is to rely on the low-battery notification rather than replacing the battery according to an exact calendar date.
What Battery Does AirTag Use?
The airtag battery is a CR2032 lithium 3V coin-cell battery.
Apple specifically instructs users to replace the battery with a new CR2032 lithium 3V battery and install it with the positive side facing upward.
CR2032 batteries are widely available from:
- Electronics stores
- Pharmacies
- Supermarkets
- Online retailers
- Battery stores
However, not every CR2032 battery necessarily behaves identically in an AirTag.
Apple notes that some bitterant-coated CR2032 batteries may not work correctly with AirTag or other battery-powered products. Apple recommends checking the packaging for compatibility with AirTag when choosing a coated battery.
This is an important detail because many CR2032 batteries look almost identical.
Why Does Battery Polarity Matter?
When installing a new airtag battery, the positive side must face upward.
The positive side is usually marked with a + symbol.
Installing the battery incorrectly can prevent the AirTag from operating properly.
Always check the orientation before closing the battery cover.
How to Check AirTag Battery Level
Apple does not provide a traditional percentage indicator for the airtag battery in Find My.
Instead, your iPhone can notify you when the battery becomes low.
You can also manually check an AirTag in the Find My app.
Follow these steps:
- Open the Find My app.
- Tap the Items tab.
- Select your AirTag.
- Look below the AirTag’s name.
- If the battery is low, Find My will display a low-battery warning.
Apple’s current support instructions confirm that a low-battery message can appear when the AirTag needs a replacement.
This makes it easy to know when your airtag battery needs attention.
Can You See an Exact Battery Percentage?
Generally, no.
Unlike an iPhone or Apple Watch, AirTag does not provide a normal percentage such as 75% or 32% in Find My.
Instead, Apple uses a low-battery warning.
That means you usually do not need to constantly monitor the battery.
How to Know When AirTag Battery Is Low
The most obvious sign is a notification from your iPhone.
You may receive an alert telling you that the airtag battery is low.
The Find My app can also show a low-battery message beneath the AirTag’s name.
Other symptoms may sometimes appear, but they should not automatically be interpreted as battery failure.
For example, if an AirTag suddenly becomes difficult to locate, the problem could involve:
- Bluetooth connectivity
- Distance
- Nearby devices
- Environmental interference
- The AirTag itself
- A depleted battery
If you see a low-battery warning, replacing the battery is the logical first step.
If there is no low-battery warning, investigate other causes before assuming the airtag battery is the problem.
How to Replace an AirTag Battery
Replacing the airtag battery is straightforward and can be done at home.
Apple’s current instructions use the following process.
Step 1: Turn the AirTag Over
Hold the AirTag with the polished stainless-steel battery cover facing upward.
Step 2: Press the Cover Down
Place your fingers over the stainless-steel cover and press down firmly.
Step 3: Rotate the Cover
While pressing down, rotate the cover counterclockwise until it stops.
Step 4: Remove the Cover
Lift the stainless-steel cover away from the AirTag.
You should now see the existing coin-cell battery.
Step 5: Remove the Old Battery
Take the depleted airtag battery out of the compartment.
Dispose of the old coin cell according to your local battery-recycling or disposal requirements.
Step 6: Insert the New Battery
Place the new CR2032 battery inside the AirTag with the positive side facing upward.
Apple says you should hear a sound indicating that the battery has connected.
Step 7: Replace the Cover
Align the three tabs on the cover with the three slots on the AirTag.
Step 8: Lock the Cover
Press down and rotate the cover clockwise until it stops.
Your new airtag battery should now be installed.
Which CR2032 Battery Should You Buy?
Choosing the correct airtag battery replacement is important.
The basic requirement is a CR2032 lithium 3V coin-cell battery.
However, Apple specifically warns that some CR2032 batteries with bitterant coatings may not work with AirTag.
Bitterant coatings are used to discourage children from swallowing coin batteries.
If you choose a coated CR2032 battery, check that its packaging specifically states compatibility with Apple AirTag.
A good replacement should be:
- CR2032
- Lithium
- 3V
- Compatible with AirTag
- From a reputable manufacturer
- Properly packaged
Avoid using a different battery size simply because it fits inside the compartment.
The correct battery type is important for safe and reliable operation.
Why Your AirTag Battery May Drain Faster
Although Apple rates the airtag battery for more than a year, some batteries may appear to drain sooner.
There are several possible reasons.
Frequent Tracking
If an AirTag is frequently involved in location-finding activity, its components may be used more often.
Precision Finding
Precision Finding can require additional communication between compatible Apple devices and the AirTag.
Frequent use may influence battery consumption.
Speaker Activity
The built-in speaker requires electrical power.
Repeatedly playing sounds can contribute to battery use.
Extreme Temperatures
Very high or very low temperatures can affect battery performance.
Apple lists operating ambient temperatures for AirTag ranging from approximately -4°F to 140°F (-20°C to 60°C).
Old Replacement Battery
A CR2032 battery that has been sitting in storage for a long time may not perform like a fresh battery.
For the best results, use a reputable, recently manufactured battery.
What to Do After Replacing the Battery
After installing a new airtag battery, the AirTag should produce a sound indicating that the battery has connected. Apple includes this sound as part of its replacement procedure.
Afterward:
- Open Find My.
- Go to Items.
- Select your AirTag.
- Confirm that it appears normally.
- Test its location or sound function if necessary.
If everything works, you are finished.
There is normally no special charging process or calibration procedure required.
AirTag Battery Problems and Fixes
Sometimes an AirTag may continue behaving strangely after installing a new airtag battery.
Here are several things to check.
AirTag Does Not Make a Sound
Remove the battery and reinstall it.
Make sure the positive side is facing upward.
If necessary, try another compatible CR2032 battery.
Find My Still Shows Low Battery
Give the AirTag a little time after replacing the battery and then check Find My again.
If the low-battery warning remains, remove and reinstall the battery.
You can also test another known-good compatible CR2032 battery.
AirTag Does Not Appear in Find My
A battery replacement will not necessarily fix a connectivity problem.
Make sure Bluetooth is enabled on your iPhone and that you are signed into the appropriate Apple Account.
Also make sure the AirTag is physically nearby when troubleshooting.
New Battery Drains Quickly
If a fresh airtag battery becomes depleted unusually quickly, consider:
- Testing another high-quality battery
- Checking for physical damage
- Avoiding extreme temperatures
- Checking whether the AirTag repeatedly activates sounds or tracking features
- Contacting Apple Support if the problem continues
A single battery can be defective, so testing another reputable CR2032 can help isolate the issue.
AirTag Battery Safety
The airtag battery is a coin-cell battery and should be handled carefully.
Apple warns that AirTag batteries can present serious hazards if swallowed, particularly for young children.
Keep new and used CR2032 batteries away from children.
Do not:
- Swallow a coin battery
- Allow children to play with loose batteries
- Puncture the battery
- Crush the battery
- Burn the battery
- Install the wrong battery type
- Use a visibly damaged battery
If a button or coin battery is suspected to have been swallowed, seek immediate medical attention.
The battery compartment should also be properly closed after replacement.
Original AirTag vs AirTag 2 Battery
Apple introduced the second-generation AirTag in 2026.
Despite its hardware improvements, the basic airtag battery design remains familiar.
| Feature | Original AirTag | AirTag 2 |
|---|---|---|
| Battery type | CR2032 | CR2032 |
| User replaceable | Yes | Yes |
| Battery design | Coin cell | Coin cell |
| Find My support | Yes | Yes |
| Precision Finding | U1-based | Second-generation Ultra Wideband |
| Water resistance | IP67 | IP67 |
| Weight | 11g | 11.8g |
Apple’s specifications confirm that the second-generation AirTag uses a user-replaceable CR2032 battery and retains an IP67 rating.
So if you already understand how to replace the original AirTag battery, the basic replacement process remains familiar on the newer model.
Can You Recharge an AirTag Battery?
No.
The airtag battery is not designed to be recharged.
AirTag uses a replaceable CR2032 coin-cell battery.
You should never attempt to recharge a standard CR2032 lithium coin cell unless the specific battery is explicitly designed for rechargeable use—and that would not be the normal battery specified for AirTag.
When the battery is depleted, replace it with a compatible CR2032 battery.
Trying to recharge or modify a standard coin cell can create serious safety risks.
How to Make Your AirTag Battery Last Longer
There is no special battery-saving mode that turns AirTag into a completely different device, but several habits can help you avoid unnecessary battery replacement.
Use a Quality Battery
Start with a reputable CR2032 battery.
Cheap or old batteries may not provide the same lifespan.
Avoid Extreme Heat
Do not leave your AirTag inside a vehicle exposed to extreme temperatures for long periods.
Avoid Unnecessary Sound Activation
If you repeatedly play sounds from your AirTag for testing or entertainment, you are using additional battery power.
Keep the AirTag in Good Condition
A damaged AirTag can develop other problems that may affect normal operation.
Check Find My Occasionally
You do not need to check the airtag battery every day.
Instead, pay attention to Apple’s low-battery notifications.
This gives you a practical warning before the tracker becomes completely unusable.
Frequently Asked Questions
What battery does an AirTag use?
The airtag battery is a CR2032 lithium 3V coin-cell battery. Apple specifies this battery type for replacement.
How long does an AirTag battery last?
Apple says AirTag works for more than a year on a standard replaceable battery. Actual lifespan can vary depending on usage and conditions.
How do I know when my AirTag battery is low?
Your iPhone can show a low-battery notification, and the Find My app can display a low-battery message under the AirTag’s name.
Can I replace an AirTag battery myself?
Yes. The airtag battery is user-replaceable. You can remove the stainless-steel cover, remove the old CR2032 battery, install a new one with the positive side facing upward, and close the cover.
Does AirTag come with a battery?
Yes. Apple ships AirTag with a CR2032 coin-cell battery installed.
Can I use any CR2032 battery in AirTag?
Use a CR2032 lithium 3V battery. Apple warns that some bitterant-coated CR2032 batteries may not work correctly, so check that the battery is compatible with AirTag.
Does AirTag have a rechargeable battery?
No. The airtag battery is a replaceable CR2032 coin cell rather than a rechargeable battery.
Why is my AirTag battery draining quickly?
Possible reasons include frequent use, temperature conditions, an old or poor-quality replacement battery, or another hardware issue. Testing another compatible CR2032 can help determine whether the battery itself is the problem.
Can I check AirTag battery percentage?
AirTag does not normally show a traditional numerical battery percentage in Find My. Instead, Apple provides a low-battery warning when replacement is needed.
Does the second-generation AirTag use the same battery?
Yes. Apple’s second-generation AirTag uses a user-replaceable CR2032 coin-cell battery.
What happens if AirTag battery dies?
Once the airtag battery is completely depleted, the AirTag can no longer operate normally until its battery is replaced. After installing a compatible CR2032, it should resume normal operation.
Is AirTag battery safe?
The battery is safe when handled correctly, but CR2032 coin cells can be extremely dangerous if swallowed. Keep both new and used batteries away from children.
Final Verdict
The airtag battery system is one of the reasons Apple’s tracker remains convenient.
Instead of charging the device every few days, you can generally use an AirTag for more than a year before replacing its CR2032 coin cell.
When the battery becomes low, Find My can alert you, so there is usually no reason to replace it on a strict schedule.
Replacing the airtag battery is also simple.
Press down on the stainless-steel cover, rotate it counterclockwise, remove the old battery, insert a compatible CR2032 with the positive side facing upward, and lock the cover back into place.
The second-generation AirTag introduced in 2026 continues to use a replaceable CR2032 battery, so the basic battery-maintenance process remains familiar.
The most important thing is to use the correct battery and handle coin cells safely.
If your AirTag suddenly stops working, do not immediately assume the tracker itself has failed. Check Find My for a low-battery warning, replace the battery with a quality compatible CR2032, and test the AirTag again.
For such a small device, the long-lasting airtag battery remains one of its most practical features.
