GoKawiilApple AirTags run on replaceable CR2032 batteries lasting about a year
AirTags use a standard CR2032 coin cell battery that typically lasts a year or more, though heavy use of features can shorten that to a few months. Users can check battery status via the Items tab in Find My, which shows an orange icon only when a replacement is needed. Replacing the battery involves twisting off the steel back cover and swapping in a new cell with the positive side up.