I bought this product because my son is a karting fan and I thought it prudent to fit it in the trailer we carry all his equipment in. Within a month of buying it we had to use it when the battery on his kart short circuited and caused a fire in the trailer. This fire extinguisher did exactly what it is supposed to do. Spending £18 on this saved us loosing £6,000 worth of equipment. It makes you realise the importance of carrying a fire extinguisher, I am ordering a replacement, and an additional one to carry in my car.