Battery: A device that produces electricity to provide power for radios, cars, etc.
Noun All cars use a battery
Candle: A stick-shaped piece of wax with a wick ( piece of string) in the middle of it that produces light as it slowly burns
Noun A candle is burning on a corner of my desk
Compass: A device for finding direction with a needle that can move easily and that always points to magnetic north
Noun I have a compass and a pocketknife in my backpack.