CyberPower CP600LCD Intelligent LCD UPS System, 600VA/340W, 8 Outlets, Compact

I purchased this for my new mid-2011 27" 3.4Ghz i7 Quad Core iMac (whew, that's a mouthful). Needless, to say I was quite worried about the fact that most new Intel i7 quad core machines (PCs and Macs) have Active PFC (Power Factor Correction) power supplies that require a UPS that puts out a pure sine-wave AC current. This Cyberpower UPS puts out a Stepped approximation to a sinewave (square sine "wave") and I wasn't sure if this would work my computer. After some digging around, I came to understand that *some* PFC power supplies are just fine with approximated sinewave whereas others require a pure sinewave. Sadly, there is no way to tell this as I've never seen this distinction mentioned in any computer manual.As it turns out the 27" Mid-2011 Mac can indeed support this type of UPS. Not only are these UPS' more economical, they are also significantly smaller and have no loud fan -- all considerable factors for a thin iMac where the computer part is practically invisible, and virtually silent, behind the LCD.I pulled this unit out of the box, threw away the manual and included USB cables without looking, and plugged in the iMac and one FireWire external drive into it and then plugged the UPS into the wall. There was no battery to connect (as was/is common with APC power supplies). I pressed the round button on the UPS to cycle through some data on the LCD (see below) and that was all there was to the installation.I did compare this to the comparable APC BACK-UPS ES BE750G 10-Outlet 750VA 120V UPS System, and despite being a longtime APC user, I voted with my pocket book for this cheaper model. The good news is that not only does the Cyberpower unit have a visible LCD display that displays tons of information (input and output voltage, battery charge capacity as a percentage, remaining time on battery in minutes, etc.), but it's also cheaper and works just fine. When I pull the plug from the wall, the readout states about 32 minutes of battery standby time. I haven't tested this to see if this is accurate, but as I never have anything more than a daily brownout (no blackouts that I can ever remember), this works like a charm. By default, the on-battery warning signal is suppressed and all I hear is a faint whirring noise when on-battery power.Overall, highly recommended for iMac users in general, and here's to hoping that your newer i7 PC works on it as well.

I love my new CyberPower device. It's awesome.Just today we had a thunderstorm and lightning hit a line somewhere near hear and the power went off in my house for about 5 seconds, just enough to reset every electronic device in the house except my computer and stuff connected to this wonderful device. I ran up to my computer and it took care of it like the Champ that it is! No disconnects. No restarts. Even my cable modem/router did not have a hiccup.I've seen some reviews on this site stating that the display hard to read which is not true. It is bright and clear and lots of options to display, including voltage in and out, % watts being used, uptime, etc. To be honest, I'm not sure how the uptime works since it does seem to reset. Right now for example it's on 12 minutes and I'm not sure why. I did not reset it.It even has a cool gadget that sits on my computer's desktop that I have showing me the current wattage that I'm using. You can also have it show you all the options on the device itself plus estimates of monthly/weekly/annual cost which is really cool. Just edit the cost per kWh and you're off.I really needed this device because where I live we have lots of thunderstorms and even strong winds sometimes blow branches onto the lines so I need to be able to turn my computer off in a controlled fashion. This device gives me 15 minutes which is plenty of time.Another thing Im not sure about is whether the max wattage of the device which is rated at 450W is the max this device will allow me to run. I think that is the case. If so, I should have gone with a 650W device or something. Generally I'm between 45% and 60%. That's cutting it close.ConclusionI really am glad I spent the significant amount of money I did on this. It is well worth it as it totally protects my devices.

I have had this UPS in service for several months now. It is a solid unit. Sits on my desktop doing its thing without complaining. According to the CyberPower widget, my total power draw ranges between 85 and 120 watts, which is about 20% of rated capacity. Works fine on the very rare power outage in keeping everything running.Only one serious complaint and the reason for deducting 2 stars: Just this week I found the cause of my desktop USB ports occasionally not working upon cold boot was the USB link with this unit. After unplugging the cable, no more problems. Since I will not be using the monitor/shutdown software, I uninstalled that as well.Update Nov 2016: Lost AC power, but the CyberPower did not keep my computer running; lots of beeping. Called tech support who answered immediately. Diagnosis was a bad battery. Since it was just within the 3-year warrantee, they sent me a replacement battery at no cost! The new battery installed easily and the unit is back up and running. It worked fine during a follow up power out test. Raising my rating by a star for the excellent tech support and honor of warrantee.One feature wish: I would like to be able to see wattage as one of the outputs on the LED display. Only shows AC voltage, minutes remaining, %Load and Battery State of Charge. You have to measure watts to calculate some of these values, so why not display it?The UPS is OK as a basic power backup, but disappointed with the USB interference issue.