I have had to replace the battery 3 times in just under a year.
The last battery is about a month old. I am buying the excat same battery that is in the unit so i don;t think it is the battery. My guess is that the BBU is faulty.
All I want is for the beeping to stop. I know that the unit is supposed to be for back up voice only but I have no phone in my house. This box is like the rest of my equipment. JUNK!!!! I have had Fios for just over a year and have had 3 DVR's, 2 cable boxes and two routers all die. Never had these issues with Comcast