Press down on the polished stainless steel battery cover.
Rotate the cover counterclockwise until it stops.
Remove the cover and take out the old battery.
Insert a new CR2032 coin cell battery with the positive side facing up.
Replace the cover by aligning the three tabs with the slots.
Press down on the cover and rotate it clockwise until it locks.
Check that the AirTag makes a sound to confirm the battery is installed correctly.