Good for you checking into this important topic. You've received sound advice sofar, and I just wanted to add a couple of comments. The multipurpose ABC is the only type you need for your home or car unless you have reactive metals such as magnesium. Don't go any smaller than the 2-1/2 pounder. The manufacturers sell little ones for the kitchen and car that are too small. A 5lb model will serve you better. Your typical "store bought" metal shell Dry Chemical extinguisher is good for 12 years after which time you need to have it hydrostatically tested (often cheaper to buy a new one). <br>Keep in mind the acronym PASS (Pull- the pin, Aim- at the base of the fire, Squeeze, Sweep). Like anything, you should be familiar with how to use it, before the emergency arises. Keep one in your car for the poor guy (it could be you) who has an engine fire along the side of the road. Each month, make sure to turn it upside down several times to keep the powder from caking to the bottom. This is very important for your car extinguisher that will want to settle and compact due to vibration. I just used some velcro tape to attach it to the trunk wheel well.