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  2. Backup battery - Wikipedia

    en.wikipedia.org/wiki/Backup_battery

    CR2032 battery used as backup battery on a notebook motherboard. Modern personal computer motherboards have a backup battery to run the real-time clock circuit and retain configuration memory while the system is turned off. [1] This is often called the CMOS battery or BIOS battery.

  3. Uninterruptible power supply - Wikipedia

    en.wikipedia.org/wiki/Uninterruptible_power_supply

    The main 50/60 Hz transformer used to convert between line voltage and battery voltage needs to provide two slightly different turns ratios: One to convert the battery output voltage (typically a multiple of 12 V) to line voltage, and a second one to convert the line voltage to a slightly higher battery charging voltage (such as a multiple of ...

  4. List of battery sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_battery_sizes

    A common size for cells inside cordless tool battery packs. This size is also used in radio-controlled scale vehicle battery packs and some Soviet multimeters. 1 ⁄ 2-, 4 ⁄ 5 - and 5 ⁄ 4-sub-C sizes (differing in length) are also available. Soviet 332 type can be replaced with R10 (#4, 927, BF, U8) or 1.5 V elements from 3 V 2xLR10 packs ...

  5. Battery room - Wikipedia

    en.wikipedia.org/wiki/Battery_room

    A battery room is a room that houses batteries for backup or uninterruptible power systems. The rooms are found in telecommunication central offices , and provide standby power for computing equipment in datacenters .

  6. Data center - Wikipedia

    en.wikipedia.org/wiki/Data_center

    Backup power consists of one or more uninterruptible power supplies, battery banks, and/or diesel / gas turbine generators. [70] To prevent single points of failure, all elements of the electrical systems, including backup systems, are typically given redundant copies, and critical servers are connected to both the A-side and B-side power

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