AirTags charge through a standard CR2032 coin cell battery, not a cable or dock

AirTags do not plug in or charge wirelessly. Instead, they use a replaceable CR2032 coin cell battery — the same flat, round battery you find in watches, calculators, and car key fobs. When the battery runs low, you open the back of the AirTag, remove the old battery, and drop in a new one. The whole process takes about 30 seconds.

A single CR2032 battery lasts roughly one year under normal use, though that depends on how often your AirTag is finding things. If you use it daily to track a frequently-lost item, the battery may drain faster. If it sits in a drawer most of the time, it may last longer.

You do not need to buy Apple-branded batteries. Any CR2032 battery from any brand works the same way. They cost between $3 and $8 for a pack of several, and you can find them at pharmacies, supermarkets, hardware stores, and online retailers.

Key Takeaways

  • AirTags use a CR2032 coin cell battery that you replace by hand — there is no charging port or wireless charging.
  • A battery typically lasts about one year, though heavy use can shorten that time.
  • Any brand of CR2032 battery works; you do not need Apple-branded ones.
  • To replace the battery, press and twist the stainless steel back of the AirTag counterclockwise until it comes loose, then swap out the old battery for a new one.
  • Your AirTag will notify you through the Find My app when the battery is running low, usually a few weeks before it dies completely.

How to open an AirTag and replace the battery

Hold the AirTag with the white plastic side facing up. Locate the stainless steel back — it is the shiny metal circle on the bottom. Place your thumb on the metal back and press down firmly while twisting counterclockwise (the direction opposite to a clock's hands). You should feel it loosen after a quarter turn or so.

Once it is loose enough, lift the metal back away from the plastic body. The CR2032 battery will be sitting inside, usually with the positive side (marked with a + symbol) facing up. Remove the old battery and set it aside. Drop the new CR2032 battery in with the positive side up, then press the metal back down and twist it clockwise until it clicks and sits flush with the plastic.

If the metal back is difficult to turn, try wrapping a small cloth around it for better grip, or use a coin to help you twist. Do not force it — if it does not budge after gentle pressure, stop and try again with a different grip angle.

Where to buy CR2032 batteries

CR2032 batteries are common and widely stocked. You can find them at most pharmacies (CVS, Walgreens, Rite Aid), supermarkets (Walmart, Target, grocery chains), hardware stores (Home Depot, Lowe's, local shops), and online (Amazon, eBay, Best Buy). A pack of two to four batteries usually costs $3 to $8.

Buy a few at once and keep them on hand. Since AirTags last about a year per battery, having spares means you will not be caught without a working battery when one dies. Store them in a cool, dry place — extreme heat or moisture can reduce battery life.

How to know when your AirTag battery is low

Your iPhone or iPad will send you a notification through the Find My app when an AirTag's battery is running low. The notification usually appears a few weeks before the battery is completely dead, giving you time to buy a replacement and swap it out without the AirTag going offline.

You can also check the battery status manually by opening the Find My app, tapping the Items tab, selecting your AirTag, and looking at the battery percentage shown on the details screen. If it shows below 10 percent, plan to replace the battery soon.

Once the battery is completely dead, the AirTag stops working until you replace it. It will not send location updates, and you will not be able to use it to find your item. This is why the early warning is helpful — you have time to act before it stops.

What to do with old CR2032 batteries

Do not throw old CR2032 batteries in the trash. They contain materials that can harm the environment if they end up in a landfill. Instead, take them to a battery recycling program.

Many retailers that sell batteries also accept them for recycling at no cost. Call ahead or check the store's website to confirm. You can also search for a local recycling drop-off location using Earth911.com or your city or county's waste management website. Some communities have battery collection days where you can drop off batteries for free.

Troubleshooting battery and charging issues

If you replaced the battery but the AirTag still shows as offline or not responding, try removing the battery, waiting 10 seconds, and reinserting it. Make sure the positive side of the battery is facing up. If it still does not work, the battery itself may be defective — try a different battery from a different pack.

If the metal back is stuck and will not open, do not force it. Soak the edge in warm water for a minute to soften any corrosion, then try again with a cloth for grip. If it still will not budge, you may need to contact Apple Support, though this is rare.

If your AirTag is physically damaged or the battery compartment is cracked, the device may not be repairable. Apple does not repair individual AirTags — you would need to purchase a replacement. However, battery and opening issues are almost always fixable with patience and the right battery.

Frequently Asked Questions

Can I charge an AirTag with a wireless charger or cable?

No. AirTags have no charging port and do not support wireless charging. They only work with a replaceable CR2032 coin cell battery that you swap out by hand.

How long does a CR2032 battery last in an AirTag?

Typically about one year under normal use. Heavy daily use may shorten this to 8 to 10 months, while light use may extend it to 14 months or longer. The Find My app will notify you when the battery is running low.

Is it safe to use non-Apple CR2032 batteries?

Yes. Any brand of CR2032 battery works in an AirTag. Apple does not make their own batteries — they use standard CR2032 cells. Buy from a reputable brand to may support quality, but you do not need to pay extra for an Apple label.

What happens if I put the battery in upside down?

The AirTag will not work. The battery must sit with the positive side (marked +) facing up. If you insert it backwards, straightforward remove it, flip it over, and reinsert it. There is no damage from trying once.

Can I use a rechargeable CR2032 battery?

Rechargeable CR2032 batteries exist but are not recommended for AirTags. They have lower voltage than standard alkaline CR2032 batteries and may not power the AirTag reliably. Stick with standard alkaline CR2032 batteries for consistent performance.