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  2. History of laptops - Wikipedia

    en.wikipedia.org/wiki/History_of_laptops

    R2E CCMC Portal laptop. The portable microcomputer "Portal", of the French company R2E Micral CCMC, officially appeared in September 1980 at the Sicob show in Paris.The Portal was a portable microcomputer designed and marketed by the studies and developments department of the French firm R2E Micral in 1980 at the request of the company CCMC specializing in payroll and accounting.

  3. Laptop - Wikipedia

    en.wikipedia.org/wiki/Laptop

    Laptops with removable batteries may support larger replacement batteries with extended capacity. A laptop's battery is charged using an external power supply, which is plugged into a wall outlet. The power supply outputs a DC voltage typically in the range of 7.2—24 volts. The power supply is usually external and connected to the laptop ...

  4. Lithium-ion battery - Wikipedia

    en.wikipedia.org/wiki/Lithium-ion_battery

    A lithium-ion or Li-ion battery is a type of rechargeable battery that uses the reversible intercalation of Li + ions into electronically conducting solids to store energy. In comparison with other commercial rechargeable batteries, Li-ion batteries are characterized by higher specific energy, higher energy density, higher energy efficiency, a ...

  5. History of the battery - Wikipedia

    en.wikipedia.org/wiki/History_of_the_battery

    History of the battery. Batteries provided the primary source of electricity before the development of electric generators and electrical grids around the end of the 19th century. Successive improvements in battery technology facilitated major electrical advances, from early scientific studies to the rise of telegraphs and telephones ...

  6. List of battery sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_battery_sizes

    3LR12 (4.5-volt), D, C, AA, AAA, AAAA (1.5-volt), A23 (12-volt), PP3 (9-volt), CR2032 (3-volt), and LR44 (1.5-volt) batteries. This is a list of the sizes, shapes, and general characteristics of some common primary and secondary battery types in household, automotive and light industrial use. The complete nomenclature for a battery specifies ...

  7. 18650 battery - Wikipedia

    en.wikipedia.org/wiki/18650_battery

    Panasonic 18650 batteries inside a laptop. Each cell has a capacity of 2450 mAh. An 18650 battery[ 1] or 1865 cell[ 2] is a cylindrical lithium-ion battery common in electronic devices. The batteries measure 18 mm (0.71 in) in diameter by 65 mm (2.56 in) in length, giving them the name 18650. [ 3] The battery comes in many nominal voltages ...

  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 that will ...

  9. Smart battery - Wikipedia

    en.wikipedia.org/wiki/Smart_battery

    A smart battery or a smart battery pack is a rechargeable battery pack with a built-in battery management system (BMS), usually designed for use in a portable computer such as a laptop. [1] [2] In addition to the usual positive and negative terminals, a smart battery has two or more terminals to connect to the BMS; typically the negative ...

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