How to extend the battery life of Apple AirTags
Apple says an AirTag tracker's battery lasts more than a year, but heavy use can drain it within a few months. Here is how to preserve it and how to replace it.
Apple's AirTag, a small item-tracking device, runs on a standard coin-cell battery that the company says lasts more than a year. In practice it can run out sooner, because battery life depends on how the tag is used. The second-generation AirTag, released earlier this year, offers the same battery performance as the previous model.
What battery it uses
Every AirTag uses a CR2032, a 3V lithium coin cell common in car key fobs and watches. These are easy to find and usually cost no more than $1 each. A new AirTag comes with a battery already installed.
To replace it, press and twist the steel cover on the underside until it comes off. Insert the new battery with the positive side facing up, then put the cover back and twist it closed. If done correctly, the AirTag plays a short sound.
You can check the battery level in the Find My app under the Items tab. An orange battery icon means the cell needs replacing; when the battery is fine, no icon appears. Older versions of the app always displayed a battery indicator, but Apple removed it because it was often inaccurate. When power is low, the AirTag limits features: Precision Finding is unavailable and it won't play sounds.
How to save power
An AirTag has no on/off switch because it constantly reports its location through the nearest Apple device. Repeatedly triggering the sound alert, using Precision Finding (which uses the Ultra Wideband chip to communicate with an iPhone or Apple Watch), and frequently opening Find My to check a tag in the next room all drain the battery faster.
Choosing a well-known brand of battery helps, as generic CR2032 cells tend to hold less charge. Apple recommends Duracell 2032; some bitterant-coated CR2032 batteries may not work in an AirTag. Avoid extremely hot or cold places: Apple rates the device for −20°C to 60°C. A tag that is constantly moving also drains faster, so one in a car may run down before one on a keychain.
