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  2. IEC 60309 - Wikipedia

    en.wikipedia.org/wiki/IEC_60309

    The pilot pin is located in the centre of main contact circle on 4- and 5-pin connectors. On 3-pin (2P+E) connectors, it is located on the contact circle opposite the ground pin. The other connectors are located 105° on either side of the earth pin, rather than 120° as in the smaller variants, to make room for the pilot pin.

  3. Battery nomenclature - Wikipedia

    en.wikipedia.org/wiki/Battery_nomenclature

    Standard battery nomenclature describes portable dry cell batteries that have physical dimensions and electrical characteristics interchangeable between manufacturers. The long history of disposable dry cells means that many manufacturer-specific and national standards were used to designate sizes, long before international standards were reached.

  4. Electrical connector - Wikipedia

    en.wikipedia.org/wiki/Electrical_connector

    Some connectors are designed such that certain pins make contact before others when inserted, and break first on disconnection. [1] This is often used in power connectors to protect equipment, e.g. connecting safety ground first. It is also employed for digital signals, as a method to sequence connections properly in hot swapping.

  5. Battery terminal - Wikipedia

    en.wikipedia.org/wiki/Battery_terminal

    Six-volt lantern batteries typically feature two coiled, cone-shaped spring terminals, designed to mate with flat contact plates on the inside of the battery compartment. Some lantern batteries instead feature screw terminals, while still others instead feature pin holes. [1] Nine-volt batteries have snap-on connectors.

  6. Nine-volt battery - Wikipedia

    en.wikipedia.org/wiki/Nine-volt_battery

    The nine-volt battery, or 9-volt battery, is an electric battery that supplies a nominal voltage of 9 volts. Actual voltage measures 7.2 to 9.6 volts, depending on battery chemistry. Batteries of various sizes and capacities are manufactured; a very common size is known as PP3, introduced for early transistor radios.

  7. Electroless nickel immersion gold - Wikipedia

    en.wikipedia.org/wiki/Electroless_nickel...

    Electroless nickel immersion gold (ENIG or ENi/IAu), also known as immersion gold (Au), chemical Ni/Au or soft gold, is a metal plating process used in the manufacture of printed circuit boards (PCBs), to avoid oxidation and improve the solderability of copper contacts and plated through-holes.

  8. Dead EV batteries turn to gold with U.S. incentives

    www.aol.com/news/dead-ev-batteries-turn-gold...

    A little-publicized clause in the U.S. Inflation Reduction Act has companies scrambling to recycle electric vehicle batteries in North America, putting the region at the forefront of a global race ...

  9. File:Gold-plated electrical connectors.jpg - Wikipedia

    en.wikipedia.org/wiki/File:Gold-plated...

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