I was told -by Cox - that the backup battery for $29.99 is REFURBISHED battery. I also had phone service during power outage before the upgrade, but will not now with the upgrade as I won't pay $30.00 + tax for a used battery. I will use my cell phone if needed. I have a complaint about the installer and have been given runaround to speak to a person in an office (not a call center rep). They can give you all sorts of avenues to order, switch, upgrade, move service, etc., but I don't want to talk to an account manager in a call center or a customer service rep in a call center. They do not want to actually hear about a complaint, just keep the billing coming...after 33 years of being Cox customer, there is no such thing as real support when I want to complain.