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The run-time for a battery-operated UPS depends on the type and size of batteries and rate of discharge, and the efficiency of the inverter. The total capacity of a lead–acid battery is a function of the rate at which it is discharged, which is described as Peukert's law. Manufacturers supply run-time rating in minutes for packaged UPS systems.
A backup battery provides power to a system when the primary source of power is unavailable. Backup batteries range from small single cells to retain clock time and date in computers, up to large battery room facilities that power uninterruptible power supply systems for large data centers.
Battery rooms are also found in electric power plants and substations where reliable power is required for operation of switchgear, critical standby systems, and possibly black start of the station. [3] Often batteries for large switchgear line-ups are 125 V or 250 V nominal systems, and feature redundant battery chargers with independent power ...
Most forms of uninterruptible power supply (UPS) can be either powered by battery or flywheel energy. These are ready for immediate use at the instant that the mains electricity fails, but the relatively small and finite amount of stored energy they contain makes them suitable for short periods of use, typically in the order of a few dozen minutes to a couple of hours depending on the actual load.
IdeaPad (stylized as IDEAPΛD and formerly ideapad) is a line of consumer-oriented laptop computers designed, developed and marketed by Lenovo.The IdeaPad mainly competes against computers such as Acer's Aspire, Dell's Inspiron and XPS, HP's Pavilion, Envy, Stream, and Spectre, Samsung's Sens and Toshiba's Satellite.
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On April 23, 2024, Lenovo announced four P series laptops. [64] The ThinkPad P1 Gen 7 is the first computer, and laptop, using CAMM2 memory modules . [ 65 ] [ 66 ] [ 67 ] [does it cos its page claims Dell had one 2 years earlier also in a laptop]