CyberPower Standby CP550SLG 550 VA Desktop UPS safeguards home/office computers and other electronics (monitors, scanners, speakers, CD/DVD players, MP3 players and phones) from surges, spikes, sags, brownouts and other power abnormalities. Its composite integrated circuitry offers advanced lightning protection. More from the Manufacturer
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Unfortunately I've had this device crash my computer more than it saved it. Without the power going out, it has dropped power to my computer unexpectedly, the same as unplugging my computer from the wall. If the power had gone out, the battery should have kicked in, but it wasn't power outages, just a failure of the UPS to work at all. I can recall it saving my computer 1 time from an outage and it surprised me. But what good is a UPS if it caused more shutdowns than it's prevented? I would have been better off plugging into the wall and suffering the 2 or so REAL outages than the 10 or so failures.
I am saving to replace it as soon as I can and am going to use it as a backup for my monitor. On the plus sides, when it works it is helpful and the voltage regulation provided helped in some poorer houses I was in (though the regulation is not as good as some more expensive models). I expect if you're willing to try and get one that works, then it would be great. I wont risk it again myself.
What's great about it: Good package, when it works