Key phrase: Warranty: None, it's a fire extinguisher
So if you lose everything you own because this gadget didn't work, you have no recourse.
Notice this has no pressure gauge? (Or even no pressure DeSoto, for you fans of Emergency!)
No, thanks! I'll stay with a UL approved fire extinguisher. At least I know what I'm getting, and can quickly whether the tank is still charged or not.