Class L Fires: Safeguarding Against Lithium-Ion Batteries

The ISO 3941:2026 standard introduces Class L, a dedicated fire category for lithium-ion batteries. These fires—common in smartphones, laptops, EVs, e-bikes, scooters, and energy storage systems—are driven by thermal runaway, where a failing cell produces extreme heat, flammable and toxic gases, and can quickly spread to neighboring cells, often reigniting after flames appear out.

Traditional extinguishers, such as water-based or powder agents, may not safely control these incidents. Class L provides a global framework for identifying and managing lithium-ion fire risks, guiding risk assessments, emergency planning, firefighter training, and specialized protection strategies, including cooling, containment, and targeted suppression tools.

Solutions like the Combat Fluorine Free Lithium-Ion Battery Fire Extinguisher address these challenges. This versatile, eco-friendly 5-in-1 extinguisher handles Class A, B, F, and lithium-ion fires, and is safe for live electrical equipment up to 1000V. Its biodegradable, fluorine-free agent cools batteries, helps prevent thermal runaway and re-ignition, and is proven to extinguish up to 600Wh lithium-ion batteries (tested under NTA 8133:2021). Certified under EN3, SS EN3, and TÜV SÜD PSB, it’s ideal for homes, workplaces, EV charging areas, and e-mobility facilities.

The rise of Class L underscores the importance of prevention, awareness, and the right tools. Organizations and individuals alike should stay informed, adopt safe practices, and equip themselves with tested solutions to effectively manage lithium-ion fire risks.