Funny thing, today I used that very same extinguisher to put out a fire on a guy's plane, a B-52 model that caught fire at Hudson Valley Radio Control Club! It is a Kidde ABC class fire extinguisher and it worked very well on some large LiPos. Everybody who flies electric should have one handy. I have never seen a glow or gas model catch fire, but 5 or 6 times I've seen electrics burn. I'm going to replace it immediately because you never know, and I have a couple inside the house as well.