Yes, you can replace an AirTag battery yourself in about 10 seconds

AirTag batteries are user-replaceable. You do not need tools, a technician, or an Apple Store visit. The battery compartment is on the back of the device — a stainless steel disc that twists off by hand. Inside is a standard CR2032 coin cell battery, the same type used in watches, calculators, and car key fobs. You remove the old one, drop in a new one, and twist the cap back on. That is the entire process.

Apple rates an AirTag battery to last about one year under normal use, which means checking its location a few times per week. Heavy use — pinging it constantly or using it on a pet that moves around all day — drains the battery faster. When the battery runs low, you get a notification on your iPhone telling you it is time to replace it. At that point, you have a few weeks before the AirTag stops working.

Key Takeaways

  • The battery compartment is the stainless steel disc on the back of the AirTag; twist it counterclockwise to open it.
  • AirTags use CR2032 batteries, which cost between $3 and $8 for a pack of four at most retailers.
  • You do not need to pair or reprogram the AirTag after replacing the battery — it works when ready.
  • If you lose or damage the stainless steel cap, Apple sells replacements for $19, though third-party caps cost less.

What battery type goes in an AirTag

The AirTag uses a CR2032 lithium coin cell battery. This is one of the most common battery types in the world, and you can find it at any pharmacy, grocery store, electronics retailer, or online. A single CR2032 costs roughly $1 to $2 when bought individually, or $3 to $8 for a pack of four. Duracell, Energizer, Panasonic, and Amazon Basics all make them, and they perform similarly.

Do not buy rechargeable CR2032 batteries for an AirTag. Rechargeable versions have a lower voltage output and will not last as long. Stick with standard alkaline or lithium CR2032 cells. Check the package label to confirm it says "CR2032" — similar-looking batteries like CR2025 or CR2016 will not fit properly in the compartment.

Step-by-step: how to replace the battery

First, locate the stainless steel disc on the back of the AirTag. It is the circular metal cap that covers the battery compartment. Hold the AirTag in one hand with the disc facing up, and use your other hand to grip the edge of the disc. Turn it counterclockwise — the same direction you would unscrew a jar lid. It takes only a quarter turn or so before the cap comes free.

Once the cap is off, you will see the old battery sitting in a shallow cup. It is a thin silver disc. Tip the AirTag gently so the battery slides out into your palm, or use your fingernail to pry it up slightly. Drop the new CR2032 battery into the cup with the positive side (the flat side with the + symbol) facing up. This is important — if you insert it upside down, the AirTag will not work.

Place the stainless steel cap back on the opening and twist it clockwise until it is snug. You do not need to force it — just turn it until it stops. Your AirTag is now ready to use. Open the Find My app on your iPhone to confirm it is still connected. The battery replacement does not erase any settings or require you to re-pair the device.

Where to buy CR2032 batteries

CR2032 batteries are sold almost everywhere. Pharmacies like CVS and Walgreens stock them in the watch and battery section. Grocery stores like Walmart and Target carry them near the checkout or in the electronics aisle. Best Buy, Micro Center, and other electronics retailers have them. Online, Amazon, eBay, and Walmart.com all ship them quickly.

Buying a four-pack is usually cheaper per battery than buying a single one, and CR2032 batteries last for years in storage. If you own multiple AirTags, a four-pack makes sense. If you only have one AirTag and do not want to stock extras, a single battery is fine — you will not need another one for at least a year.

What to do if you lose or damage the metal cap

The stainless steel disc can come loose or get lost, especially if you remove it frequently or if the AirTag takes a hard fall. If the cap is missing, the battery will fall out and the AirTag will stop working. Apple sells replacement caps for $19 each through its website and Apple Stores. This is expensive for a small metal disc, but it is the official option.

Third-party replacement caps are available on Amazon and eBay for $5 to $10. These are made by accessory manufacturers and fit the AirTag the same way the original does. They work fine, though some users report they are slightly looser or tighter than Apple's version. If you want to avoid buying a replacement cap, keep the original one in a safe place and handle it carefully when changing the battery.

How long a new battery lasts

A fresh CR2032 battery in an AirTag lasts roughly one year if you use the AirTag normally — checking its location a few times per week and pinging it occasionally. If you use Find My constantly or attach the AirTag to a pet that moves around all day, the battery may drain in six to nine months. If you rarely use the AirTag, a battery can last 18 months or longer.

Your iPhone will send you a notification when the battery is low, usually a few weeks before the AirTag stops working entirely. This gives you time to buy a new battery without the AirTag going offline unexpectedly. Once you replace the battery, the notification clears and the cycle starts over.

Frequently Asked Questions

Can I use a rechargeable CR2032 battery in my AirTag?

Rechargeable CR2032 batteries have a lower voltage than standard alkaline ones and will not power an AirTag for as long. Stick with standard CR2032 alkaline or lithium batteries. They are cheap enough that buying new ones each year is more practical than trying to recharge them.

What happens if I put the battery in upside down?

The AirTag will not work. The battery must go in with the positive side (marked with a +) facing up. If you insert it backwards, straightforward remove it, flip it over, and try again. There is no damage to the AirTag from inserting the battery incorrectly once.

Do I need to unpair my AirTag before replacing the battery?

No. Replacing the battery does not erase any data or settings. The AirTag stays paired to your iPhone and works when ready after you put in the new battery. You do not need to open the Find My app or do anything else.

Where is the battery compartment on an AirTag?

It is the stainless steel disc on the back of the AirTag. The back is the side without the Apple logo. The disc twists counterclockwise to open. If you are holding the AirTag with the logo facing you, the battery compartment is on the opposite side.

How much does a CR2032 battery cost?

A single CR2032 costs $1 to $2 at most retailers. A four-pack costs $3 to $8 depending on the brand and where you buy it. Prices are similar whether you shop in-store or online. Buying in bulk is cheaper per battery if you own multiple AirTags or want to keep spares on hand.