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CyberPower CP550SLG Standby 550VA 330W Desktop UPS

CyberPower CP550SLG Standby  550VA 330W Desktop UPS
alaScore 87

308 reviews

Nov, 2014

  • No negative mentions yet

alaTest has collected and analyzed 308 reviews from magazines and websites. Reviewers are impressed by the size. The usability also gets good feedback, but views are divided on the reliability.

price, usability, size

We analyzed user and expert ratings, product age and more factors. Compared to other Desktops the CyberPower CP550SLG Standby 550VA 330W Desktop UPS is awarded an overall alaScore™ of 87/100 = Very good quality.

Review analysis

(Based on 308 reviews)

User Reviews  

Showing 308 review(s)

Expert Reviews User Reviews
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Consumer review by: review summary for CyberPower CP550SLG Standby 550VA 330W Desktop UPS


alaTest has collected and analyzed 302 user reviews of CyberPower CP550SLG Standby 550VA 330W Desktop UPS from The average user rating for this product is 4.0/5, compared to an average user rating of 4.0/5 for other Desktops on

price, usability, size

81% of the reviews on give this product a positive rating.

This summary is based on the products: CyberPower CP550SLG Standby UPS 550VA 330W CompactCyberPower CP550SLG Standby 550VA 330W Desktop UPS

Consumer review by:

So Far so good


I have only had it a week but it works well I haven't had a power outage so don't know how long it will last.

Consumer review by:

Sorry, not interested


I always say, you gotta do the math, you gotta do your homework. I did mine and I'm glad.

Search Criteria used to find this item

Too bad the search does not match the actual item ; After the power ratings, the only 2 things I look for in a UPS are that it can automatically shut down my equipment and that the BATTERY IS REPLACEABLE and it seems you can't replace this battery


Consumer review by:

Reliable Entry Level UPS Backup


I used about 20 of these in a small public library where the power is not reliable. Often wind or storms cause power loss for a few seconds or a few minutes at a time. These UPS units are rock-solid and keep the place running smoothly.

Stable UPS with decent run-time for a desktop PC. Included Power Panel software is easy to use and displays plenty of information about the health of the UPS as well as alerting you to potential problems while you are away from the computer. Also it...


Consumer review by:

CP550SLG, Battery User Replaceable???


I was just about to order this and now holding out unless I figure out if the battery is replaceable. I would like to think that the web site is wrong from some non detail technical writer who is doing too much cut and paste but who knows. Anyone knows...

This seems to be a good UPS. All I need it is for about 3 minutes to send one alarm out before the PC shutsdown. Maybe 2 or 3 minutes

Newegg list this as a user replaceable batter, however if you go to CyberPower's web site, it says the opposite. Then if you look at the CyberPower techs response toa reveiwer, he says it is also replaceable and another reviewer also says not...

Consumer review by:

Ok Product


Good price for what you get. I have not had a chance to fully explore the battery life and switchover time - I mainly wanted to communicate one major disadvantage

DO NOT run the Self Test option from the software! After I tried this, the battery sockets were unresponsive. I contacted CyberPower about this and they admitted that Self Test causes problems with these smaller units ; Of course, NewEgg was great in...

Consumer review by:

Cyberpower 550VA


We've been having what's called "power blinking" in our area which is extremely annoying. Bought the Cyberpower and wouldn't you know it, 2 days latter it happed again. It worked as designed and kept my computer up and running. Very happy so far and...

performs well, design, easy to setup