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A hybrid (double conversion on demand) UPS operates as an off-line/standby UPS when power conditions are within a certain preset window. This allows the UPS to achieve very high efficiency ratings. When the power conditions fluctuate outside of the predefined windows, the UPS switches to online/double-conversion operation. [8]
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 ...
A computer mouse with the most common features: two buttons (left and right) and a scroll wheel (which can also function as a button when pressed inwards) A typical wireless computer mouse. A computer mouse (plural mice, also mouses) [nb 1] is a hand-held pointing device that detects two-dimensional motion relative to a surface
Note: If you don’t see Find My, go to System Services in the list of apps, click Details, then turn on Find My Mac. Select the Start button at the bottom left of your PC screen. Go to Settings.
Another ATX addition was the +5 V SB (standby) rail for providing a small amount of standby power, even when the computer was nominally "off". When a computer is in ACPI S3 sleep mode, only +5 V SB rail is used. There are two basic differences between AT and ATX power supplies: the connectors that provide power to the motherboard, and the soft ...
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Turn pop-ups off or on in your browser Most modern browsers employ pop-up blockers to keep away the annoying ads or offers that can overwhelm your experience online. While this is often a good thing as it prevents malware and other programs from infecting your computer, it can also cause problems with legitimate sites like AOL Mail.
On switching the computer back on, the computer is restored to its state prior to hibernation, with all programs and files open, and unsaved data intact. In contrast with standby mode, hibernation mode saves the computer's state on the hard disk, which requires no power to maintain, whereas standby mode saves the computer's state in RAM, which ...