It utilizes a non-toxic extinguishing agent called AVD (Aqueous Vermiculite Dispersion) which is deployed as a mist. The mist creates a film over the surface of the fire, which quickly dries and forms an oxygen barrier, cools the fire, and prevents re-ignition.

One of the key advantages of the Lith-Ex fire extinguisher is its ability to handle lithium-ion battery fires where traditional powder-based extinguishers may not be effective. The extinguisher's design is easily recognizable, ensuring that it stands out when needed during emergencies.

The extinguisher has a 13A fire rating for wood, paper, and cloth fires, indicating its effectiveness against such materials. It is also safe to use on live electrical equipment up to 1000V, making it suitable for a variety of applications, including vehicles, aviation, marine, and medical facilities.