Rated 4.7 out of 5 by 143
Rated 1.0 out of 5.0 by BS Replacemment Battery
The battery had no markings that would enable me to find a replacement on the APC site. Lead Acid Batteries vary according to the ratings. The UPS ES 550 did not have any specifications for the battery. This site is not consumer friendly.
September 14, 2016
Rated 5.0 out of 5.0 by charlie Glad I upgraded
I finally broke down and upgraded my UPS. I had a very good UPS from APC, but since I now use Mac OS 10.8.5, I could not make use of the old UPS. The old UPS did not have a usb port. Well, I did buy it new in 2003 and it worked fine with the older Mac OS 9.x.
The new one has a usb port and works great so far. All I had to do was unpack it, open the battery cover, plug in the red connector, replace the cover and plug in the power cord and usb connection to my trusty old iMac.
Other than possibly needing to replace the battery at some distant time, I am certain I will get a long life from this UPS.
September 21, 2015
Rated 5.0 out of 5.0 by OT This battery backup works great
We purchased a garage door screen for the garage and we needed a power backup in case we lose power. When purchasing this battery backup I did not realize it would work both the garage door and the garage door screen, but it do and it works perfect. Very happy what's the purchase. This product was easy to install.
September 29, 2015
Rated 5.0 out of 5.0 by Dbugme Motorhome Backup
I use this to prevent my Directv DVR from resetting when the generator is winding down from being shut down.
December 6, 2015
Rated 5.0 out of 5.0 by pdavids Works as promised
This is not a glamorous product - it just sits there under my desk doing its job. But it does its job. I live in an area with lots of lightning storms, sometimes with short power outages, and that is what this product is for. I have not had damage to any equipment that was plugged into this product, and in terms of battery backup, I often realize that there was a very short power outage due to the beep from the UPS rather than from lights blinking or the like - in other words, it response very quickly. Of course it is a "550" with limits on its UPS capabilities, but I got what I paid for and more. It is what I needed. I am very pleased.
August 11, 2014
Rated 5.0 out of 5.0 by slowman Backups
We use these units throughout our company and they work well. This was a replacement/upgrade for one with a battery that was going bad. We seem to get about 6 years + out of a unit before the batteries start to show signs of needing to be replaced.
In our areas they are a necessity as we get power outages and spikes enough that without them there could be some serious damage or loss.
September 16, 2015
Rated 5.0 out of 5.0 by Strumpett Great Products
I am very happy with APC products, they do protect everything plugged into them. I use them for my TVs, Computers even my modem/router. I hate brownouts ! Now I am using one on my home automation system
August 22, 2015
Rated 5.0 out of 5.0 by kurby APC 550 great product!
Our small business has 8 of these for our PC workstations and they work great when the power goes out. It gives us plenty of time to save our work before shutting down if the power stays out for an extended period. I also like the fact that APC gives you a return shipping label so you can ship an old unit that you're replacing back to them for free, and they gave us a discount for the new unit. The units are guaranteed for 3 years. Very happy with this product.
May 11, 2015