Lithium Battery Safety: Not All Lithium Batteries Are the Same
Recent media coverage has highlighted concerns about lithium battery fires, particularly involving e-bikes, e-scooters and consumer electronics.
However, there is an important distinction that is often missing from the headlines: not all Lithium Batteries are the same.
Lithium Battery Safety: Not All Lithium Batteries Are the Same
Recent media coverage has highlighted concerns about lithium battery fires, particularly involving e-bikes, e-scooters and consumer electronics.
The concern is understandable. The National Fire Chiefs Council (NFCC) and the Office for Product Safety and Standards (OPSS) have both highlighted the fire risks associated with lithium-ion batteries, particularly where batteries are damaged, poorly manufactured, incorrectly charged or inadequately protected. Thermal runaway can result in fire, explosive vapours and the risk of reignition.
However, there is an important distinction that is often missing from the headlines:
Not all lithium batteries are the same or use the same chemistry.
Many of the widely reported incidents involve Nickel Manganese Cobalt (NMC) batteries, commonly used in consumer products such as e-bikes, e-scooters and portable electronics. Industrial equipment is increasingly using Lithium Iron Phosphate (LiFePO₄ or LFP) batteries, a different chemistry widely recognised for its stability and safety characteristics.
Understanding that difference is key to understanding battery safety.
What Are the Main Types of Lithium Battery?
NMC (Nickel Manganese Cobalt)
NMC batteries are commonly used in:
- E-bikes
- E-scooters
- Consumer electronics
- Electric vehicles
They offer high energy density and are widely used around the world. However, like all battery technologies, they require proper charging, protection systems and careful management.
LiFePO₄ (Lithium Iron Phosphate)
LiFePO₄ batteries are increasingly used in:
- Industrial equipment
- Commercial machinery
- Energy storage systems
- Professional applications
Battery supplier Fogstar explains:
“Lithium Iron Phosphate (LiFePO₄) cells are chemically and structurally far more stable. They do not go into thermal runaway in the same way, and their phosphate chemistry is inherently non-flammable.”
Battery supplier HALB adds:
“Most incidents reported in the media involve NMC cells, not LiFePO₄ (LFP). Unfortunately, the term ‘lithium battery’ is often used without distinction.”
What Is Thermal Runaway?
Thermal runaway is a chain reaction that can occur inside a battery when excessive heat causes further heat generation.
According to the NFCC, thermal runaway may result from:
- Physical damage
- Improper charging
- Misuse
- Poor design
- Low-quality components
- Battery ageing
It can rapidly generate heat, toxic gases and fire. Some battery fires can reignite after appearing to be extinguished, making them particularly challenging for emergency responders.
This is why battery chemistry, product quality and safety systems matter.
Are Most Battery Fires Caused by the Battery Cells?
Not necessarily.
Both government guidance and fire safety organisations place significant emphasis on the entire battery system, not just the cells themselves. Protection systems, charging controls, thermal monitoring and installation quality all play a critical role in safety.
Fogstar comments:
“In almost all reported lithium battery fires, the root cause is not the chemistry itself but incorrect installation practices, poor system design, inadequate protection or misuse.”
HALB says:
“Studies show that over 95% of recent thermal incidents are linked to external circuit issues rather than the cells themselves.”
While individual incidents vary, both comments reflect the industry’s focus on system design and quality control rather than simply battery chemistry alone.
What Is a Battery Management System (BMS)?
A Battery Management System (BMS) is designed to monitor and protect a battery pack.
Modern BMS systems manage:
- Charging
- Discharging
- Temperature
- Voltage
- Current flow
The UK Government’s Office for Product Safety and Standards highlights the importance of built-in safety mechanisms designed to reduce the risk of thermal runaway and unsafe operating conditions.
HALB explains:
“If the BMS detects excessive temperature or a rapid temperature rise, it can disconnect the circuit to stop charging and discharging, preventing escalation.”
How Important Is Battery Quality?
Battery quality is critical.
The NFCC has repeatedly highlighted concerns around poorly manufactured products, unsafe modifications and low-quality battery systems entering the market.
HALB explains the importance of traceability and sourcing:
“All our cells come directly from EVE, CALB, REPT and SVOLT, followed by our own in-house inspection and testing. Reliable sourcing is essential to ensuring long-term safety.”
For businesses investing in battery-powered equipment, supplier quality and manufacturing standards are just as important as battery performance.
What Should Businesses Look For when purchasing battery-powered equipment?
When assessing battery-powered equipment, businesses should consider:
- Battery chemistry & type
- Battery Management System (BMS) protection
- Cell quality and traceability
- Product testing and certification
- Reputable manufacturers and suppliers
- Safe charging and installation procedures
The National Fire Chiefs Council continues to emphasise the importance of robust safety standards and correctly engineered products.
The Demon Approach to Building Safe Battery-powered Products
Battery-powered machinery is becoming increasingly important across:
- Facilities Management
- Construction
- Infrastructure
- Equipment Hire
- Public Sector operations
As demand grows for lower-emission, quieter and more environmentally responsible equipment, battery power will continue to play a larger role within industrial cleaning.
At Demon, safety starts long before a machine leaves the factory.
It means working with reputable battery suppliers, specifying professionally engineered battery systems, using robust Battery Management Systems and ensuring equipment is designed for industrial use.
Because the real question isn’t:
“Are lithium batteries safe?”
It’s:
“What type of lithium battery is it, and how has the complete system been engineered?”
Those details matter.
David Walke, Demon’s Director says. “At Demon with over 12 years’ experience developing battery pressure washers the journey has been long. Using Lithium Phosphate as a power source in equipment needs quality management of the system to monitor all aspects of the battery through use, maintenance and charging. Demon have fitted extensive control systems to maximise the use and lifespan of their products, and this gives the customer a product that will last.”
Reliable, flexible, and built for professionals – Demon Fire Fogging Pressure Washers give you peace of mind knowing you can respond fast when fire strikes.
