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  2. Laptop charging trolley - Wikipedia

    en.wikipedia.org/wiki/Laptop_charging_trolley

    Laptop charging trolleys, also known as laptop trolleys or laptop carts, are mobile storage containers to charge laptops, netbooks and tablet computers en masse. The trolleys are predominantly used in schools that have replaced their traditional static ICT [ 1 ] suites of desktop computers with laptops, but do not have enough plug sockets in ...

  3. Battery charger - Wikipedia

    en.wikipedia.org/wiki/Battery_charger

    A battery charger, recharger, or simply charger, [1] [2] is a device that stores energy in an electric battery by running current through it. The charging protocol—how much voltage and current, for how long and what to do when charging is complete—depends on the size and type of the battery being charged.

  4. Harman International - Wikipedia

    en.wikipedia.org/wiki/Harman_International

    Sidney Harman and Bernard Kardon founded the predecessor to Harman International, Harman Kardon, in 1953. Both Harman and Kardon were engineers by training and had worked at the Bogen Company, which was a manufacturer of public address systems. They developed high-fidelity audio products together.

  5. Bernard Kardon - Wikipedia

    en.wikipedia.org/wiki/Bernard_Kardon

    Naming their new company Harman/Kardon Inc., [7] each invested $5,000 (equivalent to $56,940 in 2023) in capital. Harman handled sales, merchandising, and advertising, while Kardon was Chief Engineer, Designer and Production Manager. In 1954 their first product was the Festival D-1000 receiver, the world's first integrated hi-fi receiver.

  6. Mark Levinson Audio Systems - Wikipedia

    en.wikipedia.org/wiki/Mark_Levinson_Audio_Systems

    Mark Levinson Audio Systems Ltd. (MLAS) was founded 1972 in Woodbridge, Connecticut (a suburb of New Haven) by Mark Levinson.Original MLAS products were designed by John Curl (Hence the JC abbreviation to many of the early products) under the supervision of Mark Levinson, with a team of associates.

  7. Harman Kardon - Wikipedia

    en.wikipedia.org/wiki/Harman_Kardon

    Harman Kardon has made desktop computer speakers. Harman Kardon has also made laptop speakers, which have been used in certain models of Toshiba, Acer notebooks, Asus laptops, Apple iMacs and Huawei's M5 tablets. A pair of Harman Kardon transparent spherical speakers, along with the Apple G4 Mac Cube for which they were designed and produced ...

  8. EmPower (aircraft power adapter) - Wikipedia

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

    This new system accepts various national power plugs and most laptop chargers will function properly at 120 V 60 Hz AC even if sold in 230 V 50 Hz AC markets. Apple offered an EmPower MagSafe power adapter for their MacBook , MacBook Pro , and MacBook Air lines of notebooks, and also included a cigarette lighter socket adapter.

  9. Smart battery - Wikipedia

    en.wikipedia.org/wiki/Smart_battery

    Besides the usual plus (positive) and minus (negative) terminals, a smart battery charger also has multiple terminals to connect to the smart battery pack's BMS. The Smart Battery System standard is commonly used to define this connection, which includes the data bus and the communications protocol between the charger and battery.