For EUC, E-Bike & PEV Riders

Lithium Battery Fire Safety

What every EUC, ebike, Onewheel, and emoto rider needs to know ... before a fire starts.

Nowadays it seems everything is powered by Lithium Batteries

Lithium-ion batteries power everything from electric unicycles to ebikes to emoto bikes — and they've changed how we ride. But they come with a risk that standard fire safety equipment isn't designed to handle. This guide covers everything a lithium-powered rider needs to know: why lithium fires are different, how to prevent them, what to do if one starts, and what the right extinguisher actually is.

EUC

ESK8

E-BIKE

E-MOPED

E-MOTO

E-SCOOTER

ONEWHEEL

Why Lithium Battery Fires Are Different

Standard fire safety knowledge doesn't fully apply to lithium-ion batteries. Once a cell enters thermal runaway, it generates its own oxygen and heat — which means smothering agents and CO2 won't stop it.

Diagram showing how lithium fires differ from traditional fires

Lithium fires carry increased risks over traditional fires.

Thermal runaway is a self-sustaining chain reaction triggered when a battery cell overheats. One failing cell heats the cells next to it — which fail, heat more cells, and so on. It can accelerate in seconds and reignite hours after the fire appears out.

Reignition Risk

Even after flames are out, a battery can reignite hours later because the internal reaction hasn't stopped.

Hydrogen Fluoride Gas

Burning lithium batteries release toxic HF gas. Most extinguishing agents don't address this hazard.

Extreme Heat

Lithium fires can exceed 1,000°F — far beyond what surface-smothering agents can cool effectively.

CO2 Failure

CO2 displaces oxygen but doesn't cool battery cells. Once it dissipates, the hot battery reignites.

THE RIGHT TOOL

What Type of Fire Extinguisher Should You Use for Lithium Battery Fires?

This is one of the most common questions in lithium fire safety — and the answer matters. The right extinguishing agent must do three things standard agents can't: penetrate the battery cells, cool thermal runaway from the inside, and address toxic byproducts like HF gas.

We choose FCL-X for the following reasons.

No PFAS or harmful residue.

Proven effective in EV and battery storage fires

Stops lithium-ion battery reignition

Reduces toxic exposure like HF

Choose Your Protection →

Lithium Fire Prevention Tips for Riders

Most lithium fires are preventable. These habits apply to EUC, ebike, Onewheel and emoto owners.

Never leave batteries charging unattended overnight

Use only the charger that came with your device — or manufacturer-approved alternatives

Charge in an open area, away from flammable materials

Let the battery cool for at least 30 minutes after a hard ride before charging

Stop using a battery that has swollen, cracked, or been in a crash

See FCL-X Applied in Real PEV Battery Fire Scenario

This footage shows FCL-X being applied during a scooter battery fire scenario.
Results vary based on conditions and application.

Frequently Asked Questions

What is the recommended fire extinguisher for lithium-ion battery fires?

The recommended agent is a water-based solution engineered to penetrate battery cells and cool thermal runaway — not just suppress surface flames. FCL-X is PFAS-free, UL listed, and certified against the NTA 8133 lithium battery fire testing standard.

Can you use a CO2 extinguisher on a lithium battery fire?

CO2 can knock down surface flames temporarily, but it doesn't cool battery cells. Once it dissipates, the still-hot battery can reignite. CO2 is not a reliable solution for lithium-ion battery fires.

What chemical agent works on lithium battery fires?

FCL-X uses a water-based aqueous solution — PFAS-free and formulated to interact with thermal runaway byproducts including hydrogen fluoride (HF). It's not a standard foam or powder; it's engineered for lithium battery chemistry.

Can a lithium fire reignite after being extinguished?

Yes. This is one of the most critical things to know. Even after visible flames are out, thermal runaway can continue internally and reignite hours later. Always monitor a battery that has been in a fire and keep FCL-X accessible.

What's the best way to prevent a lithium battery fire?

Prevention centers on three things: using the right charger, never leaving batteries charging unattended, and inspecting for physical damage (swelling, cracks) before and after rides. See our free safety checklist for a full breakdown.