apple airtag doesnt come with a rechargeable battery and it is powered by the commonly found cr2032 lithium 3v coin battery depending on the usage you may be required to change the battery of the airtag once every year while cr2032 batteries are easily found apple has now mentioned in its support page that cr2032 batteries with bitterant coatings might not work with airtag bitterant coatings are applied to hazardous substances like batteries to prevent children or pets from swallowing them how to check battery life of apple airtagopen the find my apptap the items tabtap the airtag whose battery charge you want to checkcheck the battery icon under the name of the airtagif the charge is very low youll see a banner that says low batteryhow to change the battery of apple airtagpress down on the polished stainless steel battery cover of your airtag and rotate counterclockwise until the cover stops rotatingremove the cover and batteryinsert a new cr2032 lithium 3v coin battery available at most electronic and drug stores with the positive side facing up youll hear a sound indicating that the battery is connectedreplace the cover making sure that the three tabs on the cover align with the three slots on the airtagrotate the cover clockwise until it stops