Great question and brings up great questions and responses. I agree the non-emergency number of the FD folks is a great place to get a good answer. They probably will want to see the extinguisher before giving "for sure" answers but a great start. If it is expired (out of date) you might try to use it outside under the watch of someone who has used a similar one. The first time you arm and operate an extinguisher, you'll probably do it wrong with the sprayed powder being expelled up into the air at the top of a fire (or worse, toward your face). You need to learn to not fear the feel and sound and well as learn where to point the spray. Most importantly I think is: If it's a tiny fire then maybe try to extinguish while someone else is already calling 9-1-1 for help. Generally you should not try to use the extinguisher before you call. Even tiny fires get to be large fires quickly and then these little bottles (I have one as well) won't help you. Better to call 9-1-1 for help, then maybe try the little bottle if it's a tiny fire but better just get out of the house, garage, where ever you are. You can rebuild a home, not a life.
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