Lithium Battery Storage: Preventing Fires in Wisconsin Homes

From smartphones and power tools to e-bikes and backup generators, lithium-ion batteries are powering our lives more than ever. But with this convenience comes a serious safety risk that many Wisconsin homeowners aren’t fully aware of—fire hazards caused by improper battery storage.

Over the past few years, lithium-ion battery fires have been on the rise nationwide, and Wisconsin is no exception. Whether stored in a garage, basement, or utility room, these batteries can pose a significant threat if not handled and stored correctly. As your trusted local insurance partner, Ansay & Associates is committed to keeping your home safe and protected.

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.

Safe Storage Tips for Wisconsin Homeowners

The good news? These fires are largely preventable with proper handling and storage techniques. Here are some expert-backed tips every homeowner in Wisconsin should follow:

1. 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.
2. 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.
3. 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.
4. 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.
5. 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.
6. 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.
7. 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.

How Insurance Comes Into Play

Homeowners insurance can help cover damage caused by fires—including those started by lithium batteries—but prevention is always the best protection. At Ansay & Associates, we work with thousands of Wisconsin families to review policies and make sure they’re covered for today’s modern risks.

More importantly, we help homeowners understand where they might be vulnerable. If you have a garage full of power tools, kids with e-scooters, or backup battery systems in the basement, it may be time to re-evaluate your risk exposure.

A Quick Safety Checklist for Your Home

• All batteries stored away from heat sources
• No overnight charging of tools or scooters
• Only original chargers used
• Batteries not stored in piles or drawers
• Fire extinguisher and smoke detector installed nearby
• Old or damaged batteries disposed of properly

Protect What Matters Most

Fires caused by lithium-ion batteries are preventable, and with a few simple changes, you can drastically reduce your risk. But even the safest homes need the right insurance coverage.

Ansay & Associates has been protecting families and businesses across Wisconsin for decades. We understand the unique needs of Wisconsin homeowners—from long winters that drive battery use indoors, to garage-heavy storage habits common in the Midwest.

Don’t wait until something goes wrong. Let us help you assess your current coverage, reduce your fire risk, and provide peace of mind.

Get Covered Today

Visit Ansay.com today or get in touch with an advisor below to get a free quote or schedule a review of your current homeowner's insurance. Whether you’re in Green Bay, Milwaukee, Eau Claire, or anywhere in between—we’ve got your back.

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