Before I go into to much detail, let me first explain what exactly a battery backups system is, and what it does for the appliances (in this case computers) that are attached to it. The typical battery backups system produced by APC or Belkin, can be viewed as a miniature and very limited source of power. The unit will consist of several outlets usually located on the top or rear of the unit in which you will plug your appliances into. Contained inside the unit itself is a single or multiple (depending on the size of the unit) batteries.
The battery backup system is essentially an oversized power strip in which you can plug your computer, modem, and other devices into. The main difference that the battery backups system has over your every day surge protector is that when there is a power failure or brown out, the battery backup system will immediately draw the necessary power needed to run your plugged-in applications from it's internal battery or batteries. Essentially, this unit is designed to keep power to your applications long enough for either the power to be restored or, for you to save the documents or files which you were working on so as to prevent your hard work from being wasted. This system will not provide continuous power forever! Once the battery or batteries inside the unit have been drained down, they can no longer provide the necessary power for your applications and will shutdown.
If you are doing anything which involves work on important files or documents on your computer at home or in the office, it is always a good idea to have a battery backups system installed. These little powerhouses not only provide your applications with surge protection, but they also provide the power necessary to save your work! What these systems translate into is (a) no more lost data in a power failure, and (b) you get the added bonus of surge protection that far exceeds the average power strip on the market today.
Now, not all backups systems are created equal! There are a large number of these systems available on the market, and all will differ by the capacity they carry to power your equipment. There are several different ways to calculate the draw that all of your applications your trying to backup have, or you could click your way over to APC's website and use their APC backups sizing tool to find the right battery backups system that is suited for your needs. However, you are not limited to the APC manufacturer. Once you have the specifications for the unit your applications require, you can then browse the internet in search of the right unit at the right price!
Common UPS Manufacturers:
APC
Belkin
Minuteman
Tripp-Lite
CyberPower
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