I got this because I was sick to death of the internet going dead time after time, at least three or four times every week, usually right in the middle of some crucial piece of research. This power massager has prevented almost all further blackouts, with only one brief incident since installation. I had even tried calling Contact Energy over the problem, thinking the wiring in the house was suspect. Their dismissive response, with a threat of a $200 callout fee if the technician found nothing wrong, was entirely unhelpful and predictable. With this battery equipped surge protector, with an LCD panel showing input and output voltages,...view more I got this because I was sick to death of the internet going dead time after time, at least three or four times every week, usually right in the middle of some crucial piece of research. This power massager has prevented almost all further blackouts, with only one brief incident since installation. I had even tried calling Contact Energy over the problem, thinking the wiring in the house was suspect. Their dismissive response, with a threat of a $200 callout fee if the technician found nothing wrong, was entirely unhelpful and predictable. With this battery equipped surge protector, with an LCD panel showing input and output voltages, battery charge and power issue status, gives a very reassuring level of confidence in the safety and efficacy of my electrical equipment. And the price is way less than the Contact Energy callout fee! I was so pleased I bought two of them, one for my computer (except for the printer, do not use it for that!) and one for my TV and home theatre system. So my valuable stuff is well protected, and now functions reliably, at no continuing cost as well.

I use this to run a Unifi Switch-8 150W (connected to two downstream PoE access points), a Qotom mini-pc (J1900) running pfsense, and a QNAP TS-453U NAS. It works well, and gets me through power cuts here. It's quite compact and fits nicely onto a shelf on my rack, and has a good, bright, clear display so I can see what's going on. It shows load, voltage, and battery time remaining.

Cons are that there is only 2 plugs - one on the UPS and another surge protected. It also has a fixed, wired in power cable. This was a pain as I had everything set up to use IEC C15 (jug cord) type connectors and had to move a few things around.

On balance ...view more I use this to run a Unifi Switch-8 150W (connected to two downstream PoE access points), a Qotom mini-pc (J1900) running pfsense, and a QNAP TS-453U NAS. It works well, and gets me through power cuts here. It's quite compact and fits nicely onto a shelf on my rack, and has a good, bright, clear display so I can see what's going on. It shows load, voltage, and battery time remaining.

Cons are that there is only 2 plugs - one on the UPS and another surge protected. It also has a fixed, wired in power cable. This was a pain as I had everything set up to use IEC C15 (jug cord) type connectors and had to move a few things around.

On balance though it's great, and very good value.

Works as advertised. Despite what is stated in another review, this UPS works flawlessly in linux, just not with the companies official software (at least not on my system). You must use NUT. Monitoring and shutdown functions fine. https://blog.warbel.net/index.php/2017/09/15/configuring-powershield-ups-on-linux-and-integrating-into-zabbix/ Works as advertised. Despite what is stated in another review, this UPS works flawlessly in linux, just not with the companies official software (at least not on my system). You must use NUT. Monitoring and shutdown functions fine. https://blog.warbel.net/index.php/2017/09/15/configuring-powershield-ups-on-linux-and-integrating-into-zabbix/

It may be a great machine, however, I noticed that the support for Linux systems is poor.
The Linux driver software is not up to date, and wreaks havoc with Firefox. It also did not detect the UPS.

On Windows7 , the UPS works fine. However, the UPS software has limited functionality and comes with large and clunky user interfaces. It may be a great machine, however, I noticed that the support for Linux systems is poor.
The Linux driver software is not up to date, and wreaks havoc with Firefox. It also did not detect the UPS.

On Windows7 , the UPS works fine. However, the UPS software has limited functionality and comes with large and clunky user interfaces.

This model of UPS is worth for 5 start as a rating for UPS feature and surge protection. it is quite worth for the money. However, I think this batch of products have a manufacture issue as it comes out a strong ort of chemical smell after running over night (the total connected device load was under 80W). After the smell continued for three nights, I decided to return it. I have owned seven UPSs of Dynamix, Eaton, and APC, and this is the first time I ever experience this kind of chemical smell issue with UPS. This model of UPS is worth for 5 start as a rating for UPS feature and surge protection. it is quite worth for the money. However, I think this batch of products have a manufacture issue as it comes out a strong ort of chemical smell after running over night (the total connected device load was under 80W). After the smell continued for three nights, I decided to return it. I have owned seven UPSs of Dynamix, Eaton, and APC, and this is the first time I ever experience this kind of chemical smell issue with UPS.

Very happy with the product. The set up was very easy and does the job I need it to do. Very happy with the product. The set up was very easy and does the job I need it to do.

The defender UPSD 650 went almost 3 years of problem-free service. It has a 2-year warranty and replacement batteries have a 1-year warranty I get a lot of power cuts here so it was a good purchase. The defender UPSD 650 went almost 3 years of problem-free service. It has a 2-year warranty and replacement batteries have a 1-year warranty I get a lot of power cuts here so it was a good purchase.

Our off-grid power frequently has micro-interruptions when the back-up generator kicks in and out. These cause spikes and drop-outs which had been damaging to our computer equipment. This inexpensive device has effectively become a combined UPS, power conditioner and surge protector. I am considering a second or third unit for some of our other expensive electronic gear in the near future. Our off-grid power frequently has micro-interruptions when the back-up generator kicks in and out. These cause spikes and drop-outs which had been damaging to our computer equipment. This inexpensive device has effectively become a combined UPS, power conditioner and surge protector. I am considering a second or third unit for some of our other expensive electronic gear in the near future.

Works out of the box. I can confirm, it works with QNAP NAS as well (at least with my old TS-220), it was immediately recognized as external device (UPS) over USB. I wish it could also wake up my NAS over USB once the power is restored... Works out of the box. I can confirm, it works with QNAP NAS as well (at least with my old TS-220), it was immediately recognized as external device (UPS) over USB. I wish it could also wake up my NAS over USB once the power is restored...

great product good price great product good price

Works exactly as you would expect and good value for money compared with other brands Works exactly as you would expect and good value for money compared with other brands

Good size - great for the site office running the laptop on a generator. Easy to use. Good size - great for the site office running the laptop on a generator. Easy to use.