If you are planning to purchase an UPS you will have to make sure that you choose the very best. Best means efficacy with cost effectiveness. So, before you purchase an UPS, you will need to know about the leading UPS brands that are in business.
The most well known UPS brand is the APC. Almost every OS has drivers for UPS and it covers from 350VA which is able to handle a small computer and LCD to 1500VA for more powered server class system. The UPS coming out of the APC factories are known to run on batteries for at least 45 minutes. Another brand that is very well known is TripLite. It can handle low end system and at the same time you can use it to power a server. It is supported by many OSs. If you are looking for something cheap then CyberPower is a good option for you.