Excerpt: We are a small non-profit, and we need UPS support for our computer systems as we're a medical and dental clinic. These battery back-ups support a computer and two monitors perfectly. They do exactly what we need them to do.
Summary: I'll have to take APC's word for it that this saves energy compared to the 8 year old model. Works fine with plugs on top so it can fit on the floor under the computer desk. Rear mounted plug on upright models are hard to access in my location.
Summary: I have been a long time user of APC Back-UPS equipment but have never had so close a call before. I was considering the purchase of a replacement battery for the old 420 that I had when I decided to upgrade to a new smaller 550. I made the purchase online and picked it up at my local store.