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  2. AC adapter - Wikipedia

    en.wikipedia.org/wiki/AC_adapter

    The X-connector here provides 3.5 and 2.5 mm phone plugs and two sizes of coaxial power connector Universal laptop power supply with adjustable voltage between 12 and 24 volts. External power adapters can fail, or can become separated from the product they are intended to power. Consequently, there is a market for replacement adapters.

  3. Battery charger - Wikipedia

    en.wikipedia.org/wiki/Battery_charger

    Charging a 12 V lead–acid car battery A mobile phone plugged in to an AC adapter for charging. A battery charger, recharger, or simply charger, [1] [2] is a device that stores energy in an electric battery by running current through it.

  4. Power supply unit (computer) - Wikipedia

    en.wikipedia.org/wiki/Power_supply_unit_(computer)

    For example, the 5 V and 3.3 V rails are rated with a combined total current limit. For a description of the potential problem, a 3.3 V rail may have a 10 A rating by itself (33 W), and the 5 V rail may have a 20 A rating (100 W) by itself, but the two together may only be able to output 110 W. In this case, loading the 3.3 V rail to maximum ...

  5. Power electronics - Wikipedia

    en.wikipedia.org/wiki/Power_electronics

    An HVDC thyristor valve tower 16.8 m tall in a hall at Baltic Cable AB in Sweden A battery charger is an example of a piece of power electronics. Power grid designer in front of a newly installed 880kV thyristor valve array A PCs power supply is an example of a piece of power electronics, whether inside or outside of the cabinet.

  6. Polarity symbols - Wikipedia

    en.wikipedia.org/wiki/Polarity_symbols

    Diagram showing positive tip polarity on the left and negative tip polarity on the right. To read diagram: The center positive drawing on the left indicates that the center (also known as the tip) of the output plug is positive (+) and the barrel (ring) of the output plug is negative (−).

  7. Dell XPS - Wikipedia

    en.wikipedia.org/wiki/Dell_XPS

    The Dell XPS 14 (9440) was released in early 2024 and is a 14.5" laptop between the Dell XPS 13 and the XPS 16. It has thinner bezels, a seamless touchpad, and edge-to-edge keyboard with a touch function row, it offers two 14.5" display options, 1920x1200 LCD, or 3200x2000 OLED display, both at a refresh rate of 120Hz.

  8. Trickle charging - Wikipedia

    en.wikipedia.org/wiki/Trickle_charging

    Trickle charging is the process of charging a fully charged battery at a rate equal to its self-discharge rate, enabling the battery to remain at its fully charged level. This state occurs almost exclusively when the battery is not loaded, as trickle charging will not keep a battery charged if current is being drawn by a load.

  9. Coaxial power connector - Wikipedia

    en.wikipedia.org/wiki/Coaxial_power_connector

    After the two common 5.5 mm OD (Outer Diameter) plugs, the next-most common size is 3.5 mm OD with a 1.3 mm ID (Inner Diameter), usually about 9.5 mm in length, although both longer and shorter versions also exist. These 3.5 mm OD plugs are normally used for lower voltages and currents.