Lithium-Ion Battery Fires at Home: How to Charge, Store, and Dispose Safely

Lithium-ion batteries power almost everything we plug in — phones, laptops, cordless tools, e-bikes, e-scooters, and hoverboards. They're compact, powerful, and mostly safe. But when they fail, they fail fast: a damaged or overheated cell can go into "thermal runaway," releasing flammable gas and reaching temperatures over 1,000°F in seconds.

Fire departments across the country are reporting a sharp rise in lithium-ion battery fires, especially from e-bikes and e-scooters charged inside homes and apartments. The good news: a few simple habits dramatically reduce the risk.

Why lithium-ion batteries catch fire

Most failures come down to one of four things:

• Physical damage — a dropped phone, a punctured pack, or a battery that's been crushed or bent
• Overheating — leaving devices in a hot car, direct sun, or on a soft surface that blocks airflow
• Bad or counterfeit chargers — off-brand or damaged chargers that push the wrong voltage
• Aging or defective cells — batteries that swell, bulge, or leak are already failing

Once one cell fails, it can cascade to the others. That's why lithium-ion fires are so hard to put out with a standard extinguisher — even after the flames are gone, cells can reignite.

Safer charging habits

Use the charger that came with the device

Off-brand chargers, especially cheap replacements, are one of the biggest causes of battery fires. Stick with the manufacturer's charger, or a certified replacement from a reputable brand.

Don't charge overnight or while you're away

Charge when you're home and awake. If a battery fails while you're asleep, you may not hear the smoke alarm until the fire has spread.

Charge on a hard, non-flammable surface

Never charge a phone, laptop, or tool battery on a bed, couch, pillow, or pile of clothes. Use a desk, table, or countertop with airflow around the device.

Never charge e-bikes or e-scooters inside a bedroom or hallway

These have some of the largest lithium-ion packs in the home. If they ignite, they can block your only exit. Charge them in a garage, on a balcony, or in a room with a door you can close — never in the path you'd use to escape.

Unplug when fully charged

Modern chargers are supposed to stop when the battery is full, but leaving a device plugged in for days at 100% stresses the cells and increases long-term risk.

Watch for warning signs

Stop using a battery immediately if you notice:

• Swelling or bulging — a phone case that won't close, a laptop that rocks on a flat surface, or a battery pack that looks puffy
• Unusual heat — hot to the touch even when idle
• Odd smells — a sweet, chemical, or plastic burning odor
• Popping, hissing, or clicking sounds
• Discoloration or leaking fluid

Move the device outside, away from anything flammable, and contact the manufacturer or your local hazardous waste program.

Safe storage

• Keep batteries and devices at room temperature — not in hot cars, garages in summer, or freezers
• Store spare batteries in their original packaging or a hard plastic case
• Never store loose lithium-ion batteries in a drawer with metal objects (coins, keys, tools) that could short the terminals
• Keep them away from direct sunlight and heat sources like radiators or stoves

Never throw them in the trash

This is one of the biggest sources of fires at recycling centers and in garbage trucks. Lithium-ion batteries — even ones you think are dead — hold enough charge to spark when crushed.

Drop them off at:

• A retailer with a battery recycling bin (many hardware and electronics stores participate)
• Your city or county's household hazardous waste facility
• A Call2Recycle drop-off location (call2recycle.org)

Tape over the terminals of loose batteries with electrical or duct tape before you transport them.

If a battery catches fire

• Get everyone out. Close the door behind you to slow the fire's spread.
• Call 911 from outside. Tell the dispatcher it's a lithium-ion battery fire — that changes how firefighters respond.
• Do not try to move the device. A burning battery can explode or spray molten material.
• A standard ABC extinguisher may knock down flames but won't stop the reaction inside the cell. The battery can reignite.
• Never use water on a lithium-metal (non-rechargeable lithium) fire. For lithium-ion, water is the recommended agent for firefighters using large volumes — but for a homeowner, evacuating and calling 911 is safer than trying to fight it yourself.

The 60-second home audit

Walk through your home right now and check:

• Are any e-bikes, e-scooters, or hoverboards charging near an exit or bedroom?
• Are any phone or laptop batteries swollen?
• Are you using the original charger for every device?
• Do you have a working smoke alarm on every level and inside every bedroom?
• Do you have a plan to get out if the fire starts near your charging area?

Lithium-ion batteries are here to stay — but a few small changes to how you charge, store, and dispose of them keep a convenience from becoming a catastrophe.