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2. Automobile auxiliary power outlet - Wikipedia

   en.wikipedia.org/wiki/Automobile_auxiliary_power...

   Standardized 12 volt DC automobile plugs are defined in the United States by UL Standard 2089 regarding vehicle battery adapters. This standard covers plugs and cord sets that insert into cigarette lighter receptacles. In Europe, 12 volt plugs and sockets are not specially regulated and do not require approvals for the CE mark. [citation needed ...

3. DC connector - Wikipedia

   en.wikipedia.org/wiki/DC_connector

   A 12–Volt cigar lighter plug. The automobile auxiliary power outlet is also called a cigarette lighter receptacle, or cigar lighter receptacle, since it was originally designed as a lighter for cigars—hence its rather large size. Nowadays, it is used to power automotive accessories such as portable inverters, mobile phone chargers and ...

4. EmPower (aircraft power adapter) - Wikipedia

   en.wikipedia.org/wiki/EmPower_(aircraft_power...

   Even though EmPower adapters are rated at 15 volts instead of 12 volts like cigar lighter receptacles, most accessories made for the so-called "12-volt outlets" have enough voltage tolerance to allow for a voltage as high as 15 without step down DC-to-DC converter. Modern AC and USB EmPower Outlets Universal Airline AC Socket Layout

5. Jump start (vehicle) - Wikipedia

   en.wikipedia.org/wiki/Jump_start_(vehicle)

   Cigarette lighter outlet An alternative to jumper cables is a cable used to interconnect the 12 volt power outlets ( cigarette lighter outlets ) of two vehicles. This method slowly recharges the battery, not by providing the current needed for cranking, as the engine cranking motor current draw will greatly exceed the fuse rating in a cigarette ...

6. Polarity symbols - Wikipedia

   en.wikipedia.org/wiki/Polarity_symbols

   Polarity symbols are a notation for electrical polarity, found on devices that use direct current (DC) power, when this is or may be provided from an alternating current (AC) source via an AC adapter. The adapter typically supplies power to the device through a thin electrical cord which terminates in a coaxial power connector often referred to ...

7. Coaxial power connector - Wikipedia

   en.wikipedia.org/wiki/Coaxial_power_connector

   Common DC power connectors. A coaxial power connector is an electrical power connector used for attaching extra-low voltage devices such as consumer electronics to external electricity. Also known as barrel connectors, concentric barrel connectors or tip connectors, these small cylindrical connectors come in an enormous variety of sizes.