AirTags are powered by small CR2032 lithium coin cell batteries, which are generally safe and stable when used properly. However, like all lithium-based batteries, there is a very small risk of overheating, leaking, or catching fire if the battery is damaged, improperly replaced, or exposed to extreme conditions. Understanding how to handle and store AirTags correctly minimizes this risk.
Fire Risk and Battery Type
AirTags use 3V CR2032 lithium coin cell batteries, not rechargeable lithium-ion cells. These batteries are chemically stable and designed for low-power devices such as watches, remotes, and medical instruments.
Because they don’t recharge or store large amounts of energy, the risk of fire is extremely low. Under normal use, AirTags do not generate significant heat or electrical stress that could cause ignition.
Situations That Could Cause a Battery to Overheat or Fail
While rare, a CR2032 battery can become hazardous under certain conditions.
1. Exposure to Extreme Heat
Leaving an AirTag inside a hot car, near a heater, or in direct sunlight for long periods can cause the battery to overheat or leak. Prolonged temperatures above 60°C (140°F) may damage the internal components or increase the risk of thermal failure.
2. Physical Damage
Crushing, puncturing, or bending the AirTag can deform or short-circuit the battery, which may lead to leakage, swelling, or combustion.
3. Incorrect Battery Replacement
Using the wrong battery type or forcing a battery into the AirTag may cause pressure or short circuits. Always use a flat, uncoated CR2032 battery and ensure the positive side (+) faces upward.
4. Mixing Old and New Batteries
Never mix old and new batteries or different brands in devices that use multiple cells. While AirTags only use one battery, storing extras incorrectly or inserting a damaged one can increase risks.
Apple’s Safety Design
Apple incorporates several safety features to minimize fire or overheating risks:
- The AirTag draws a very small electrical current, reducing strain on the battery.
- The battery compartment is sealed and pressure-fitted, limiting exposure to air or moisture.
- AirTags are not rechargeable, which eliminates the most common cause of lithium battery fires – overcharging.
These safeguards make an AirTag no more likely to catch fire than a traditional wristwatch or calculator battery.
Safe Handling and Storage Tips
To keep your AirTags safe and reliable:
- Use only CR2032 lithium batteries from reputable brands (Panasonic, Energizer, Maxell, etc.).
- Avoid coated batteries, as coatings can interfere with contact and cause overheating.
- Store spare batteries in a cool, dry place away from metal objects and heat sources.
- Keep batteries out of reach of children, as ingestion can be dangerous and cause internal burns.
- Do not expose AirTags to direct flames, microwaves, or extreme pressure.
What to Do If an AirTag Gets Hot or Leaks
If you notice your AirTag becoming warm, bulging, or leaking:
- Stop using it immediately.
- Do not touch leaking fluid – it may be corrosive.
- Place the AirTag in a nonflammable area (such as on a metal surface).
- When cool, safely dispose of the battery at an authorized recycling or hazardous waste center.
- Replace the battery only once the device has cooled completely and shows no signs of damage.
Disposal and Recycling
Used or damaged lithium batteries should never be thrown in household trash.
Instead:
- Take them to a battery recycling drop-off at electronics or hardware stores.
- Follow local recycling guidelines for lithium batteries.
Proper disposal helps prevent environmental harm and reduces the risk of fires in landfills or waste facilities.
Summary
- AirTags use non-rechargeable CR2032 lithium coin cell batteries, which have a very low fire risk.
- Fire or overheating is only possible if the battery is damaged, exposed to extreme heat, or misused.
- To stay safe, use high-quality batteries, replace them correctly, and store them properly.
- If an AirTag becomes hot, leaking, or swollen, stop using it immediately and dispose of the battery safely.