A cigarette car, as far as I know, is not a term used to describe any specific object or device. However, a cigarette lighter or cigarette lighter receptacle is a common feature in automobiles and trucks. It was initially designed to power an electrically heated cigarette lighter, but it has become a de facto standard DC connector to supply electrical power for portable accessories used in or near an automobile. The cigarette lighter receptacle is a metal or plastic cylinder containing a thin flat coil of nichrome metal strip, through which high current (~10 amperes) passes to heat up the coil and create a flame. Nowadays, the cigarette lighter receptacle is used to power a variety of devices, such as lights, fans, beverage heating devices, and small motorized tools such as air compressors for inflating tires. Many portable electronic devices such as music players or mobile telephones use a cigarette lighter receptacle to recharge their internal batteries or to directly operate from the vehicle electrical system.