What to Do If Your E-Bike Catches Fire
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What to Do If Your E-Bike Catches Fire
E-bike fires are one of the fastest-growing fire hazards in Australia. NSW recorded 323 lithium-ion battery incidents in 2024 — nearly double the figure from two years earlier — and fire services across the country are issuing warnings. Yet most e-bike owners have no idea what to do if their battery ignites.
This guide walks you through exactly what happens during a lithium-ion battery fire, the steps you need to take in the critical first moments, and — just as importantly — what you should never do.
Why E-Bike Fires Are Different
A lithium-ion battery fire is not like a kitchen fire or a petrol fire. It is driven by a process called thermal runaway — a chain reaction inside the battery cells that generates its own oxygen, meaning the fire continues to burn even without air.
Once thermal runaway starts, it can escalate from a small amount of smoke to a fully involved fire in under 30 seconds. The gases released are toxic and flammable, and the fire can reignite hours after it appears to be out.
Never pour water on a lithium-ion battery fire. Water reacts with lithium compounds to produce hydrogen gas, which is explosive. It can also cause electrical shock and spread the fire further.
What to Do If Your E-Bike Catches Fire
Speed matters. Follow these steps in order — do not deviate, and do not go back to retrieve belongings.
Alert everyone in the building and evacuate without delay. Do not attempt to move the bike — lithium-ion fires can flare violently when disturbed.
Call emergency services immediately and tell them it is a lithium-ion battery fire. This is critical — it affects what equipment they bring and how they respond.
If the fire is still very small and you have an EV-rated extinguisher or fire blanket within reach, you may be able to suppress it. Do not attempt this if the fire has spread or if you are not trained. Your safety comes first.
Closing doors behind you slows the spread of smoke and fire. Do not lock them — fire services need access.
Even after the fire appears out, the battery can reignite. Wait for the fire service to declare the area safe before re-entering.
Why a Standard Fire Extinguisher Won't Work
Most households keep a standard dry powder or CO₂ extinguisher. These are designed for conventional fires — wood, paper, liquids, or electrical equipment. They are not effective against lithium-ion thermal runaway because they cannot penetrate the battery cells or absorb the heat generated from within.
A purpose-built EV fire extinguisher uses an aqueous vermiculite dispersion (AVD) agent specifically designed to coat and cool lithium-ion cells, interrupting the thermal chain reaction that standard agents cannot reach.
How to Prevent an E-Bike Fire
Charge safely
Around 18% of lithium-ion fires occur during charging. Never charge overnight, never charge an e-bike in a bedroom or hallway, and always use the manufacturer's original charger. Using third-party chargers is one of the leading causes of battery degradation and fire risk.
Store at the right temperature
Heat accelerates battery degradation. Don't store your e-bike in direct sunlight or in a hot car. Ideal storage is in a cool, dry space — ideally with your battery removed and stored separately if leaving unused for extended periods.
Watch for warning signs
Lithium-ion batteries often give warning signs before failing: unusual heat during charging, swelling or bulging of the battery casing, a chemical or burning smell, or unexpected drops in battery life. If you notice any of these, stop using the battery immediately and contact the manufacturer.
Have the right equipment ready
If you own an e-bike, you should have either an EV fire extinguisher or an EV fire blanket in your home. A fire blanket is particularly useful in confined spaces like garages — it can contain the fire and toxic gases while you evacuate and wait for emergency services.
Don't wait for an incident to find out you're not prepared.
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