Automobile auxiliary power outlet

Not to be confused with the similarly looking but incompatible ISO 4165 sockets/plugs (also called a 'Hella', 'Powerlet' or 'Merit') used on Motorcycles (esp. BMW), in caravaning etc.
"car charger" redirects here. For connector clips used to connect to and charge car batteries, see crocodile clips. For charging stations and connectors for electric vehicles, see Charging station.
Auxiliary power outlet for front passengers
Metal and plastic cigarette lighter receptacles
Mobile phone charger for use in automobiles
Power inverter for producing 60 Hertz square wave power from an automobile outlet as a way to power home appliances.

An automobile auxiliary power outlet (also known as car cigarette lighter or auxiliary power outlet[1]) in an automobile was initially designed to power an electrically heated cigarette lighter,[1] but became a de facto standard DC connector to supply electrical power for portable accessories used in or near an automobile directly from the vehicle's electrical system. Such include mobile phone chargers, cooling fans, portable fridges, electric air pumps, and power inverters.[1]

In most vehicles, at least one car outlet is present. Some vehicles may have more power outlets: usually one for the front passengers, one for the rear passengers and one for the luggage trunk.

The voltage of the power outlet is usually near 12 V DC, and may be elevated between 13.5 V to 15 V while the engine is running. On trucks, the voltage of the power outlet may be near 24 V DC.

The 12 V power circuit is protected by a car fuse, often rated at 10 to 20 amperes, which provides 120 to 240 watts of power. Large appliances such as hair dryers or toasters draw too much power to be fed from an auxiliary power socket. If wired directly rather than through the ignition, an empty car battery can be charged through the outlet from an external power source, which is more convenient albeit slower than currents supported through electrical clamps on the car battery.[2]

  1. ^ a b c LifeWire.com article: “From Car Cigarette Lighter To 12V Accessory Socket”
  2. ^ Sandoval, David (2010-10-06). "How to Charge a Car Battery Through a Cigarette Lighter". It Still Runs. Retrieved 27 October 2021.