Better fire extinguisher than the Kidde replacement?

I ran across these while surfing last week.

Element Fire Extinguishers

I'm pretty interested in getting a couple for vehicles, though they are not cheap my any means.

Small light, never need maintenance, 50 or 100 second run time depending on the size, A,B,C,K rated.

They work by using a KNO3 reaction to flood the area with Potassium (K) to bind oxygen.

https://cdn.shopify.com/s/files/1/3001/3080/files/ElementOperationDescription.pdf

Seems Promising.

CC