Fire Classes


Li Batteries Li Batteries Class A

Lithium battery extinguishing performance verified in accordance with 60Wh test protocol developed by Zentrum fur Sonnenenergie-und Wasserstoff-Forschung (ZSW) GmbH.

Lithium batteries present a more frequent fire hazard each day as the number of consumer and industrial goods powered by Lithium batteries increases. Although the risk of a Lithium battery fire is not widely considered, the potential for a fire exists in many everyday situations.

The typical mechanisms that cause a fire to start in a Lithium battery are as follows:

  • ✔ Physical damage / impact
  • ✔ Over charging
  • ✔ Heat exposure

If any of the three above mechanisms become critical, the electrolyte in the battery cell will start a chemical reaction that produces flammable gases and when the critical oxygen gas mix is reached with sufficient internal heat generation the device will burst into flames.


Lithium Battery

A few examples of typical consumer goods and industrial goods that are classified as a fire hazard include:

  • Mobile phones and portable computing equipment
  • Children's toys
  • Electric bikes and scooters
  • Radio-controlled vehicles, watercraft, aircraft
  • Power tools
  • Radio communication equipment
  • Health service and hospital monitoring and test equipment


This risk is further exacerbated by low quality and poorly manufactured batteries coming from low cost countries, most frequently in Asia. The overcharge protection is often not present on these batteries and the quality of manufacture renders them more prone to failure due to physical impact or damage.

Testing has shown that typical water, powder and foam extinguishing agents are not effective in extinguishing Lithium battery fires.

Testing has proven Lith-Ex to be effective in suppressing and extinguishing Lithium battery fires in line with a test protocol developed by battery testing experts ZSW GmbH.


Where does a safety case exist to justify the installation of Lith-Ex aerosol extinguishers?

Lithium batteries are being used more and more extensively around the home, in mobile phones, childerns toys, tablets and laptops, they tend to be charged overnight quite often in the bedroom. Cordless tools and many other items of rechargeable equipment are becoming more popular and the risk of damage or overcharge is always a concern.

Each of these pieces of equipment has the potential to overheat and become a serious fire hazard. A quick, portable extinguisher which is effective against a Lithium battery fire is essential; Lith-Ex is the ideal product.

There are also many public places which are at risk of Lithium battery fires, areas where there are large gatherings of people in confined spaces, often evacuation of the area is difficult or even impossible, on an aircraft for example.

Class A: Ordinary combustibles

AVD-(Li) extinguishing agent has been independently tested and accredited to 21A when applied from a 9 Litre extinguisher in accordance with BS EN 3-7:2008.

Class A is probably the most common type of fire, they occur when materials become heated to their ignition temperature and will continue to burn as long as there is heat, oxygen and fuel available. Materials involved in these types of fires include paper, wood, textiles, rubber, some plastics and other organic carbon based compounds.