Customer Ratings & Reviews

I have already experienced some brown-outs that this product got me through with no damage to equipment or data. I have a Sabrent external hard drive/memory device that had an old 1TB hard drive from an old HP desktop that died, and this old hard drive finally died from power black-outs/brown outs when my old CyberPower - Standby 450 VA desktop was fatally damaged from a near-by lightning strike that also took out an old TV. I am using the Sabrent for an old memory card that I had around and the CyberPower 550 is protecting both the Sabrent device and the memory storage card.

Seems to operate well. We will see in time. Much larger and heavier than expected.

Had one of these before and loved it so I purchased another one!

I always depend on Cyberpower, they are great products at a good price.

After doing my research, i needed something to protect my modem and give me a little peace of mind for backup since I now work from home.

Good equipment to work with, I am an IT guy and I always use bestbuy for my customers, easy to but easy to setup

This is a good smaller unit to easily hide under cabinets or desks, and protect your equipment at the same time.

Great UPS for the price. Works great. USB connection to PC allows auto shutdown.

It works like it is supposed to work, I guess. XXXX

Great UPS. Used to protect for TV and audio components.

It was easy to set-up and works well. You do not have to connect battery wires as with some other brands. It performed exactly as it should every time I tested it. Note: although the battery came partially charged, you should charge it up fully per the instructions for maximum performance. The only negative is that it beeps every 30 seconds when the household power goes out and it is running on battery power. You can disable this using the included Windows software, but it will remain disabled only as long as the USB cable (also included) is connected to a computer. In my case, I don't want the UPS connected to a computer. I temporarily connected it to a computer and used the software to turn off the beeps, but as soon as I disconnected the computer, the annoying beeps were back. Too bad, otherwise rating would be 5 stars.

This battery runs my wireless router and vonage box and can charge my cell phone for over an hours time. I'm not sure exactly how long the battery can last because the unit beeps every 30 seconds when the power goes out. Not sure how this is a feature since the whole point of the unit is to supply power when you don't have any. I've had to find my way to the unit with a flashlight and shut if off several times when the power has gone out at night. If I was getting another unit I'd make sure it doesn't have this beep!

It's not the most pricey UPS out there, but I still can't recommend it. The battery in mine wore out in about 13 months. Now that the battery is gone, it will crash a PC on a brownout that wouldn't affect one plugged directly into the wall. As near as I can figure it, it must be instantaneously failing over to the dead battery on any flicker which crashes the PC. Maybe its not so bad to get a years protection for this price, but I have two others that cost twice this much that have protected equipment for nearly four years with no signs of failing.

I bought and installed this back up from CyberPower over a year ago. I live in a farm house in the middle of the country where lightning strikes and power outages occur frequently in summer and winter. From 10 below zero to 99 degrees it works fine for me. This powerful and efficient back up system has never failed me. If it can do the job here - it should do the job for you. I have two laptop computers, 3 printers, a DSL modem and Dell 19" monitor plugged into it.

I have 4 of these units and they all do the power backup job very well. Be careful if you have a power generator and need to use it. For some reason some of the units beep after the generator is on and you neet to remove them form the circuit to restore your computer or other devices being supported. Kind of sick I think.

overall this product is great it backs up my 20 in. imac with no problem. no setup required dont need to install the software. just plug it in and thats it overall great product definitely buy it

We have used APC's for years at our office & home but no longer. Those stop working in 12 to 15 months! The CyberPower ones operate at least 24 to 30 months - twice as long for the same price. Also, APC ones seem to short out for some reason. We have over 20 backup power supplies in use today, including our TV and audio equipment at home.

This product works well as an inexpensive backup power solution for my Internet connection. Provides plenty of power for the cable router, Wi-Fi base station and the VoIP router.

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.

I run small office with 6 of these but 3 maybe now 4 have failed. Battery lasts a few years, but when it goes...it just shuts down! Have tried to get battery to replace but cost is $25 and $15 to ship!!! can just go to store and buy new one for a few bucks more! Will probably look to get different one online with free shipping...