What is Uninterruptible power supply?
[[File:UPSFrontView.jpg|thumb|Uninterruptible power supply]] An '''uninterruptible power supply''' (or '''uninterruptible power source'''; '''UPS''') is an [[apparatus]] that provides [[electric power]] in an [[emergency]] when there is a problem with the normal electricity supply. It provides an almost [[wikt:instant|instantaneous]] supply of electricity during any power failure. It is used normally to protect any sensitive [[Computer hardware|hardware]] ([[computer]], [[data center]], [[telecommunication]]) in which if there is any disruption of power supply, it might easily damage that equipment. [[File:Apc_ups_rs500_08.jpg|alt=Sealed Lead-Acid Battery|thumb|Lead acid battery from an UPS unit.]] UPS batteries are [[Lead acid battery|lead acid batteries]] that use gel [[sulfuric acid]] instead of the [[liquid]] sulfuric acid [[Car battery|car batteries]] use. UPS batteries are sealed and have the ability to store electricity and provide a consistent high surge [[Direct current|DC current]] to a UPS system which converts it to a stabilized [[Alternating current|AC current]]. UPS batteries have a wide selection of dimensions and one of their main properties is that they do not leak or produce fumes. This is one of the most important reasons why they are used safely in houses, server rooms, data centers, manufacturing environments, hospitals, offices, and other poorly ventilated areas. These sealed lead-acid batteries can be found in some of the electronics stores or UPS specialized stores. Most people use a type of UPS<ref>{{Cite web|date=2022-06-12|title=Types of UPS Power Supply|url=https://millenniumups.com/types-of-ups-power-supply/|access-date=2023-08-29|website=Millennium UPS|language=en-US}}</ref> called a full-time or full double conversion UPS, which is also the most effective. The utility power that comes into a UPS is alternating current (AC), which is also what most IT equipment needs (ITE). Choosing the correct UPS for the job is very important.<ref>{{Cite web|date=2022-06-12|title=How to Choose t