While the easiest way to contain an unexpected fire and prevent severe property damage is to stop the fire from starting in the first place, but beyond that, you need a fire extinguisher — but not all of them are made the same. HalGuard Fire Extinguishers ($125-$170) were developed for racing use, and employ Halotron 1, an electrically non-conductive "clean" extinguishing agent that rapidly turns into a gas, so they're safe for parts and wiring, pose no risk of electric shock, and leave no nasty residue to clean up, whether it's in the car, house, or office.