Apple AirTag uses a CR2032 3V lithium coin cell battery, which is a standard, user-replaceable button battery.

Quick Scoop: Battery Type

  • AirTag is designed for a single CR2032 lithium coin battery (3 volts).
  • CR2032 cells are widely used in small electronics like remotes, key fobs, and watches.
  • Other coin sizes like CR2450 are not supported for AirTag and should not be used.

Extra Notes You Should Know

  • Apple’s instructions specify inserting a “CR2032 lithium 3V coin battery” with the positive side facing up.
  • Some CR2032 batteries with a child‑safety bitter coating may fail to make proper contact in AirTags, so Apple recommends versions explicitly marked as compatible with AirTag.
  • With normal use, a good CR2032 typically lasts about a year in an AirTag before needing replacement.

Mini How‑To (Very Short)

  1. Press and turn the stainless steel back counterclockwise to open.
  1. Swap in a new CR2032 3V coin cell, positive side up.
  1. Close and twist the cover clockwise until it stops; you should hear a confirmation sound.

Bottom note: Information gathered from public forums or data available on the internet and portrayed here.