Lithium-ion batteries power many of the devices people rely on every day, and fire safety officials are urging caution as concerns continue to grow about how they are charged, stored, and used in homes everywhere.
The North Lake Tahoe Fire Protection District says these batteries are found in cell phones, laptops, cordless tools, e-bikes, e-scooters, electric vehicles, power banks, and household equipment. While they provide convenience, officials warn that damaged, defective, or improperly charged batteries can pose a serious fire risk. These fires can ignite quickly, burn intensely, and be difficult to extinguish.
Most homes contain dozens of lithium-ion batteries, and as more devices rely on them, incidents involving battery fires have increased nationwide.
Charging safety remains a key concern. The North Lake Tahoe Fire Protection District encourages people to always use the charger designed for a specific device or battery and to buy replacement batteries and chargers from reputable manufacturers or retailers, including UL-certified products.
Officials also advise avoiding generic or universal chargers unless approved by the manufacturer. Batteries should be charged on hard, non-combustible surfaces away from combustible materials and should not be charged while sleeping or left unattended.
Warning signs can appear before a battery failure. These include excessive heat, bulging or swelling, unusual sounds, strange odors, poor performance, and smoke. If any of these signs are noticed, the battery should be stopped from use immediately and moved to a safe location if possible. If a battery begins smoking, people should move away, alert others, and call 911. Smoke may indicate thermal runaway, a dangerous chain reaction that can lead to fire or explosion.
E-bikes and e-scooters require additional caution because they typically contain larger lithium-ion battery packs. The fire district advises following manufacturer charging instructions, avoiding modifications to batteries or electrical systems, never using damaged batteries, storing batteries in cool and dry locations, and having them inspected by qualified technicians if concerns arise.
Proper disposal is also important. Damaged, recalled, or unwanted lithium-ion batteries should never be placed in household trash or recycling bins. Improper disposal can lead to fires in garbage trucks, recycling facilities, and landfills. Instead, approved battery recycling or hazardous waste disposal programs should be used.
“Lithium-ion batteries have become part of everyday life, but safe charging, storage, and maintenance practices can significantly reduce the risk of fire. If something seems off, do not ignore it,” said NLTFPD Fire Marshal John James. "Heat, swelling, unusual odors, or smoke are all warning signs that a battery may be failing. Early recognition and proper action can prevent a serious fire and protect lives and property."
For more information on lithium-ion battery safety, visit the National Fire Protection Association’s resources here: National Fire Protection Association lithium-ion battery safety
