Apple estimates that your AirTag will last about a year before the battery runs out with average use and tracking. Fortunately, unlike most Apple products, you can replace the built-in battery. Here̵
Before disassembling your AirTag, you will need a new battery to replace the old one. Apple’s Bluetooth tracker uses a standard 3-volt CR2032 button battery. These can be easily purchased from your local electronics store or from online retailers such as Amazon.
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With a new battery in hand, it’s time to replace the dead one in your AirTag.
Start by holding your AirTag with the white plastic side down and the metal case with the Apple logo facing up. Then place two fingers on the metal side, press down (while pressing the plastic half) and turn counterclockwise.
You can now remove the metal cover. Doing so will find the tracker’s CR2032 battery. Turn the AirTag upside down to remove the battery. Now insert your new coin cell battery into the slot with the positive side up. You should be able to read any engraved text on the CR2032 if installed correctly.
Finally, put the metal cap back on the AirTag, making sure that the metal teeth align with the grooves in the plastic housing. Just like when you took the AirTag apart, place two fingers on the metal half (while applying pressure to the plastic side) and twist clockwise. The tracker will sound an audible chime when turned on to let you know that the installation was successful.
If you have any problems, you can follow the video below to see the replacement in action:
Your Apple AirTag battery should last another year. You can now go back to tracking your keys, running shortcut automations, and more.