Battery: A container consisting of one or more cells, in which chemical energy is converted into electricity and used as a source of power.
Noun. The control needs batteries.
Candle: A cylinder or block of wax or tallow with a central wick that is lit to produce light as it burns.
Noun. The candle needs fire to illuminate.
Compass: An instrument containing a magnetized pointer which shows the direction of magnetic north and bearings from it.
Noun. The compass told us to go north.