Blazing statistics
Battery fires are happening more often than ever. Research from the UK shows that between 2022 and 2024, the number of lithium-ion-related fires shot up by 93% – with e-bikes making up a big share of that growth. The numbers are alarming enough that they’ve already prompted tougher standards and new regulations. In the Netherlands, for instance, some schools have gone as far as banning e-bikes outright or setting up secure parking zones away from classrooms.
The biggest case to date unfolded this February in Gdańsk, Poland, when a storage facility went up in flames, destroying around 1,300 e-bikes and roughly 1,000 batteries. It took 300 firefighters to bring the inferno under control. But how do you prevent something like that from happening at your own place? Veteran e-biker Richard Gasperotti has a few answers.
Charging time is a risk time
The greatest risk of ignition comes during charging. Most e-bike battery fires stem from mechanical damage, manufacturing defects or poor charging practices, such as using a knockoff adapter. The consequences can range from devastating property loss to serious personal injury.
That’s why it’s crucial to always use the original charger, and to pick the right location and time. For example: charging overnight inside a house where people are asleep can be extremely dangerous. Whenever your battery is plugged in, keep an eye on it so you can react fast if something goes wrong.
Not all batteries are created equal
“When buying, it’s important to choose products that come with proper certifications and from trusted retailers. That’s the only way to ensure the battery meets safety standards and doesn’t pose a higher fire risk. Quality products are better protected against moisture and mechanical damage. It’s wise to steer clear of shady or too-good-to-be-true offers and stick to authorised dealers,” advises Richard Gasperotti, professional e-biker and Bosch eBike Systems ambassador.
“Modern technology from established brands dramatically increases battery safety through a mix of smart management systems, solid construction, and precise manufacturing,” he adds.
According to Richard, today’s lithium-ion batteries are under constant surveillance by a Battery Management System (BMS) that monitors their condition, detects potential faults in time, and prevents overheating, overload or deep discharge. “Each cell is encased in non-flammable plastic, fitted with an integrated fuse to cut off current in case of overload, and thermally protected to prevent overheating and dangerous chain reactions,” explains the e-bike pioneer.
He notes that even if unwanted gases form inside a cell, modern designs allow for their safe release so they don’t threaten the rest of the pack. Carefully engineered seals keep water out, while highly automated production minimises the risk of assembly errors.
Keep an eye on battery health
Experts stress the importance of following manufacturer guidelines not only for safe handling, but also for prolonging battery life. Age matters: older batteries are more likely to become fire hazards, and replacing them after a certain time is often the safer option. Warning signs include extreme heating during charging, swelling or visible deformation. If any of these show up, the battery should be retired immediately.
Handle with care
For safe use, never attempt to open a battery yourself – only qualified technicians should do that. Protect it from heat, direct sunlight, and flames. Don’t immerse it in water, don’t leave it exposed to rain when transporting it on a car rack, and definitely don’t clean it with a hose or pressure washer.
Storage matters too: never keep it next to small metal objects such as keys, screws or nails that could cause a short circuit. And, of course, avoid impacts, sharp objects or improper mounting that could puncture or damage it.
What if it catches fire?
An immediate fire risk arises if the battery starts making strange noises, hissing or releasing a strong odour. If you notice smoke while charging, firefighters recommend disconnecting the charger right away and – if it’s safe to do so – moving the battery outside as quickly as possible. If it’s built into the bike frame, that means moving the whole bike.
If that’s no longer possible, the safest move is to evacuate immediately and call the fire brigade. The chances of putting out a battery fire by yourself are slim. In some cases, submerging the battery in water can help prevent fire spread, but circumstances – and, above all, personal safety – always come first.
“No piece of property is worth risking your life or health for,” reminds Richard Gasperotti.
