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  2. DC connector - Wikipedia

    en.wikipedia.org/wiki/DC_connector

    A DC connector (or DC plug, for one common type) is an electrical connector that supplies direct current (DC) power. Compared to domestic AC power plugs and sockets, DC connectors have many more standard types that are not interchangeable. The dimensions and arrangement of DC connectors can be chosen to prevent accidental interconnection of ...

  3. Nickel–cadmium battery - Wikipedia

    en.wikipedia.org/wiki/Nickel–cadmium_battery

    During charging, the battery temperature typically stays low, around the same as the ambient temperature (the charging reaction absorbs energy), but as the battery nears full charge the temperature will rise to 45–50 °C. Some battery chargers detect this temperature increase to cut off charging and prevent over-charging.

  4. 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, current, for how long and what to do when charging is complete—depends on the size and type of the battery being charged. Some battery types have high tolerance ...

  5. The best power banks and portable chargers for every device ...

    www.engadget.com/computing/accessories/best...

    For a little more juice and an equally clever design, Anker’s 30W Nano Power Bank is a good option for delivering a single charge. It’s bigger in size and capacity (10,000mAh) and includes a ...

  6. Type 2 connector - Wikipedia

    en.wikipedia.org/wiki/Type_2_connector

    The connector is circular in shape, with a flattened top edge; the original design specification carried an output electric power of 3–50 kW for charging battery electric vehicles using single-phase (230V) or three-phase (400V) alternating current (AC), with a typical maximum of 32 A 7.2 kW using single-phase AC and 22 kW with three-phase AC ...

  7. The best uninterruptible power supply (UPS) - Engadget

    www.engadget.com/2020-03-13-the-best...

    The CP800AVR uses a modified sine-wave inverter to turn the DC power in the battery into a rough approximation of standard AC power. Rated for at least 600 VA output: Most models explicitly ...

  8. Battery nomenclature - Wikipedia

    en.wikipedia.org/wiki/Battery_nomenclature

    Battery numbering. IEC 60086 battery type designation system. Examples of the IEC nomenclature are batteries coded R20, 4R25X, 4LR25-2, 6F22, 6P222/162, CR17345 and LR2616J. The letters and numbers in the code indicate the number of cells, cell chemistry, shape, dimensions, the number of parallel paths in the assembled battery and any modifying ...

  9. The best multi-device wireless chargers you can buy - Engadget

    www.engadget.com/best-multi-device-wireless...

    That’s not to say these will be slow, but there just isn’t much separating them on the speed front. As a general rule, the quickest multi-device chargers tend to top out at 15W for phones. And ...