What Battery For

What battery does an AirTag take?

An AirTag runs on one CR2032 coin battery, and you change it yourself by twisting off the back cover.

The battery it takes

CR2032

Apple says AirTag takes one CR2032 lithium 3V coin battery, fitted with the positive side up.

Available on Amazon

CR2032 coin batteries, multi-pack Bitter-coated CR2032 batteries

For an Apple AirTag, from Apple Support

From Apple

  • Bitter-coated cells: look for “Compatible with Apple AirTag” on the pack

As an Amazon Associate, What Battery For earns from qualifying purchases.

How to change the battery

  1. Press down on the polished stainless steel battery cover and turn it counterclockwise until it stops.
  2. Lift off the cover and take out the old battery.
  3. Put in a new CR2032 with the positive side facing up. You’ll hear a sound when it connects.
  4. Line up the three tabs on the cover with the three slots on the AirTag, then turn the cover clockwise until it stops.

Bitter-coated batteries

To discourage swallowing, Apple suggests a CR2032 with a bitterant coating, such as the Duracell 2032 with Bitter Coating. Apple also warns that some coated batteries might not work with AirTag or other battery-powered products.

Checking the battery level

Your iPhone shows a notification when the AirTag battery is low. To check it any time, open the Find My app, tap the Items tab and tap the AirTag. Low Battery appears under its name when the charge is low.

Keep coin batteries away from children

Apple warns that an AirTag, its battery cover and the battery might be a choking hazard to small children. It adds that a swallowed coin battery can cause internal chemical burns in as little as 2 hours.

The National Capital Poison Center says that if anyone swallows a battery, immediately call the 24-hour National Battery Ingestion Hotline at 1-800-498-8666 or your poison center at 1-800-222-1222. Don’t delay. Immediate treatment decreases severity.

Common questions

Where can I get a CR2032 for an AirTag?

Apple says CR2032 lithium 3V coin batteries are available at most electronic and drug stores.

Keep going

Batteries for home devicesCoin battery size chartCR2032 vs CR2025 vs CR2016

Where we get our information from

From Apple Support’s AirTag battery page and the National Capital Poison Center, read on October 25, 2026. Checked against published data from National Capital Poison Center and Apple.

See all 2 sources
  • National Capital Poison Center, Button battery ingestion (poison.org/battery)
  • Apple Support, How to replace the battery in your AirTag (published October 14, 2026)

Battery sizes come from battery makers' datasheets and device makers' own manuals and help pages. Check your device's manual or the old battery before you buy. If anyone may have swallowed a battery, call the National Battery Ingestion Hotline at 1-800-498-8666 or your poison center at 1-800-222-1222 straight away.