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  2. Society of Blue Buckets - Wikipedia

    en.wikipedia.org/wiki/Society_of_Blue_Buckets

    The Society of Blue Buckets (Russian: Общество синих ведёрок Obshchestvo sinikh vedyorok) is a free [clarification needed] protest movement that emerged in Russia in 2010 [1] as a response to the arbitrary, self-serving use of emergency rotating blue flashers by public servants.

  3. Battery regenerator - Wikipedia

    en.wikipedia.org/wiki/Battery_regenerator

    As a battery is discharged the density of lead sulfate in solution increases. In common designs, it reaches a critical density when discharged to about 75% depth of discharge, or below. [2] For instance, a 12V battery with a 100 ampere hour (Ah) capacity will reach this density when 25 Ah (300 Wh) or more have been drawn from the battery. At ...

  4. Blue light station - Wikipedia

    en.wikipedia.org/wiki/Blue_Light_Station

    A Blue Light Station is a combined emergency telephone and emergency power-off switch in rapid transit stations and other points along electrified railways. They are common in the United States and Canada. [citation needed] The location of such a device is usually indicated by a blue light.

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  6. Battery charger - Wikipedia

    en.wikipedia.org/wiki/Battery_charger

    Chargers for stationary battery plants may have adequate voltage regulation and filtration and sufficient current capacity to allow the battery to be disconnected for maintenance, while the charger supplies the direct current (DC) system load. The capacity of the charger is specified to maintain the system load and recharge a completely ...

  7. Emergency vehicle lighting - Wikipedia

    en.wikipedia.org/wiki/Emergency_vehicle_lighting

    Tow truck & support vehicle operators employing blue flashing lights must install and operate them in tandem with flashing amber lights, blue lights alone may not be used. The flashing blue lights may only be used when stopped. [32] Red and blue: police; and ‘other non-police law enforcement’ [a] in all provinces and territories.

  8. Electric battery - Wikipedia

    en.wikipedia.org/wiki/Electric_battery

    An electric battery is a source of electric power consisting of one or more electrochemical cells with external connections [1] for powering electrical devices. When a battery is supplying power, its positive terminal is the cathode and its negative terminal is the anode. [2] The terminal marked negative is the source of electrons.

  9. Automobile auxiliary power outlet - Wikipedia

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

    Plus in newer cars, the power output from the lighter plug is so reliable that it can charge laptops, without any voltage problems. 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.