Lithium-ion battery devices are just about everywhere in our homes, from smartphones to cordless power tools. While the devices are convenient, it’s important to know safety tips to prevent lithium-ion batteries from overheating and starting a fire.

What should I look for when buying rechargeable items?

Look for a safety certification from a nationally recognized testing laboratory like UL (Underwriters Laboratories) or ETL (Intertek). These certifications show the lithium-ion battery inside the product meets minimum U.S. safety standards for electrical and fire safety.

When are lithium-ion batteries most at risk of catching fire?

Charging is the riskiest time for lithium-ion batteries. To stay safe, always use the charger that came with the device or one that’s approved by the manufacturer. Using an incompatible charger can lead to overheating, which increases the risk of fire.

What are the warning signs that a charging battery might be unsafe?

Watch for these common signs of battery failure:

• Unusual heat.
• A bulging or swollen battery.
• A strange, sweet, or metallic smell.

If you notice any of these, stop using the device right away and unplug it from the charger.

Where is the best place to store lithium-ion battery-powered devices?

Store devices in a cool, dry place, away from direct sunlight and extreme temperatures. Avoid keeping battery-powered items in cars, garages, or outdoor sheds, especially during very hot or cold weather.

What’s the safest way to dispose of lithium-ion batteries?

Never put lithium-ion batteries in the regular trash or recycling bin. Damaged or improperly discarded batteries can ignite and cause fires in garbage trucks and landfills.

Instead, take them to a certified battery recycling center. Find a location near you at Call2Recycle.org.

Can I safely charge an e-bike and scooter indoors?

No. The safest place to charge e-bikes and scooters is on a hard surface outdoors out of direct sunlight in a dry place.

How do I safely charge devices with lithium-ion batteries?

While no method is completely risk-free, you can reduce the fire risk by:

• Charging on a hard, non-flammable surface.
• Keeping devices away from flammable materials (such as beds, rugs, and couches).
• Monitoring the device.
• Unplugging after charging.

How do I know if my device has a lithium-ion battery?

Many everyday rechargeable devices use lithium-ion batteries, including:

• Smartphones, tablets, and smartwatches.
• Laptops.
• Power tools.
• E-bikes, e-scooters, and electric vehicles (EVs).
• Electric toothbrushes.

Check the product manual or labeling for battery information.

• Smoke alarms: Where to put them, how often to replace batteries
• How to escape from a house fire
• Safe charging tips for your home (National Fire Protection Association video)