The dry powder type extinguishers are throwaways- - - -the old fashioned CO2 types are much more effective, work on a wider variety of combustibles, and can be refilled repeatedly. "Buy once- - - -cry once!" No matter what a good extinguisher costs, it's cheap insurance!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!