Lithium-Ion Batteries: A Growing Fire Risk for Your Business

Why these fires are different

A lithium-ion battery on fire does not burn like paper or oil. The real problem is thermal runaway: a damaged or overheated cell starts to heat up, which heats the cell next to it, and so on in a chain reaction. The temperature can climb to 500 C and higher.

And it is not just a hot fire. The battery releases its own gases and its own oxygen as it breaks down, so smothering the flames is not enough the way it would be with an ordinary fire. That is why this counts as a distinct hazard that needs a distinct approach.

Three dangers to remember

• Extreme heat: up to 500 C or more, enough to spread fire to nearby materials in seconds.
• Toxic gases: hydrogen fluoride, carbon monoxide and other compounds that make the air dangerous to breathe well before flames are visible.
• Reignition: a battery that looks out can flare up again minutes or hours later, from residual heat and gases trapped inside.

Why the extinguisher on the wall will not fix it

This is the part many people miss. Standard extinguishers are not built for a lithium-ion battery fire. Water can react with the cell's chemistry and make things worse instead of putting the fire out. CO2 and dry chemical may knock the flames down for a moment, but they do not cool the core of the battery, so the chain reaction keeps going and the fire comes back.

Be clear on this point: to date, no portable extinguisher is ULC-listed specifically to put out a lithium-ion battery fire in Quebec. The units marketed as lithium specific mostly help cool the battery and buy time, not guarantee extinguishment. The real management tool is prevention and evacuation, not one miracle extinguisher.

Where the risk comes from at work

This is not theoretical. These batteries are everywhere: phones, laptops, cordless power tools, electric carts and vehicles, plus the e-bikes and scooters staff bring in and charge on site. The more devices charging unattended, the higher the risk.

• Physical damage: a battery dropped, crushed or punctured.
• Overcharging: leaving a device plugged in overnight or using a non-compliant charger.
• Manufacturing defect: cheap or counterfeit cells bought online.
• Poor storage: heat, humidity, or a pile of loose lithium batteries in a drawer.

What to do if a battery goes into runaway

If a battery swells, hisses, gives off smoke or a chemical smell, treat it as the start of a fire. The right move is not to play firefighter.

• Clear the area and get people around you out, because of the toxic gases.
• Pull the alarm and call 911.
• Do not breathe the smoke and do not lean over the device.
• Leave the fire to the firefighters, who have the techniques and gear for this kind of fire.
• Treat the battery as dangerous even after it cools, given the risk of reignition.

Prevention is where you actually win

Since no extinguisher solves this for sure, the real protection happens before the fire. A few simple rules cut the risk in a business a lot.

• Buy batteries and chargers from reputable brands that meet standards like UL or CE.
• Avoid overcharging and unattended charging, especially overnight.
• Set up a charging spot that is cool, dry and clear, away from anything combustible.
• Store spare batteries in fire-rated bags or containers made for lithium cells.
• Inspect regularly: a swollen, cracked or leaking battery comes out of service right away.
• Avoid temperature extremes, both freezing and the heat of a vehicle or an unheated space.

How this fits your fire safety program

Lithium-ion batteries do not change the basics of compliance. You still need portable extinguishers in good shape, inspected to NFPA-10 and meeting the National Fire Code (CNPI 2020) as applied in Quebec, for the ordinary fires in your building. What changes is that you should add a battery piece to your plan: charging zones, staff training, evacuation instructions. A solid inspection record helps you keep it current and prove it during a visit.

If you want your inspections, deficiencies and service dates in one place, the Canuck360 portal keeps it all together, and a call to 418-905-3396 gets an inspection on the calendar.