Lithium Battery Storage: Preventing Fires in Wisconsin Homes

Why Lithium Batteries Can Be Dangerous

Lithium-ion batteries contain highly flammable components and are vulnerable to overheating. If they are damaged, overcharged, exposed to heat, or improperly stored, they can experience what’s called “thermal runaway.” This leads to sudden fires that spread rapidly and are difficult to extinguish.

In recent years, fire departments across the country have reported a spike in house fires caused by rechargeable batteries in garages and basements. E-bikes charging overnight, cordless power tools left near heat sources, or boxes of old laptop batteries stored near flammable materials have all led to devastating outcomes.

Storage Tips

The good news is that most battery fires are preventable with a few simple habits:

• Store in a Cool, Dry, and Well-Ventilated Space
  Avoid attics, hot garages in the summer, or sealed boxes. Opt for a cool shelf in a well-ventilated room—not next to heaters or direct sunlight.
• Use the Right Charger
  Always charge batteries with the manufacturer-recommended charger. Cheap or off-brand chargers can overheat batteries and increase the fire risk.
• Never Charge Unattended or Overnight
  It may be convenient, but charging batteries overnight—especially in the basement or garage—has led to several house fires. Only charge when someone is home and awake.
• Don’t Store Loose Batteries Together
  Store batteries in their original packaging or a battery case. Loose batteries touching each other can short-circuit and catch fire.
• Avoid Damage and Extreme Temperatures
  Don’t crush, drop, or expose batteries to freezing or excessive heat—both can damage internal components and spark fires.
• Look for Warning Signs
  If a battery is swelling, hot to the touch, leaking, or giving off a strange smell—stop using it immediately and move it to a safe, non-flammable area.
• Properly Dispose of Old Batteries
  Never throw lithium batteries in the trash. Wisconsin has several battery recycling centers and hazardous waste programs. Contact your local municipality for drop-off locations.

Get Covered Today

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Your home is your most important investment. Let Ansay & Associates help you protect it—smartly, safely, and completely