Hmmm.... I'm going to take a leap here and saw that many of us that visit here probably have VOIP of some kind, which probably means that the base is next to the router. On that assumption, you need to power the router as well. Furtrhermore, I would also say most of us probably already have our router on a UPS, which would presume that the phone base is already plugged into the SAME UPS.
So, if it was 10 years ago, this would be an AWESOME deal.