I purchased Comcast's XBB24-A backup battery and connected it to my xFi modem/router. There were no instructions with the battery other than a diagram on how to connect it. Last weekend, my power went out as part of a planned safety shutoff by our utility company. When the power switched off, the XBB24-A failed to keep the modem on. I then unplugged the modem and plugged it back in, and pressed the button on the top. A flashing orange (not white as usual) white appeared on the modem and there was limited Internet connectivity for approximately 1 minute, until the modem again lost power. I repeated once more, with the same result, then I gave up. I cannot find where Comcast has made any more information or instructions on this battery available. Does anyone know why this battery would not work properly? Thanks for your advice.