You will want to replace the battery because sooner or later you will need to turn the system off for something and a UPS won't help you then. As mentioned previously, the specs can be found on the battery. You can get a battery at Batteries Plus or try Mike Sandman @ sandman.com. I think the battery is a solder on but it isn't overly difficult. Plan on replacing the battery again in about 4 years.
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<font face="Verdana, Arial" size="2">Originally posted by paul144:
It sounds like the system is in defalut programming. If the battery is dead, then all programming is lost when power is disconnected and the system is going back to default.
You can get the battery specs off of the battery itself. You just need to match volts and amps...
I do not remember if that is a solder in or not.
You might also want to consider an external computer battery back-up/ surge protector from an office supply store. One of those should be able to keep the phone system up for several hours.
This would allow you to avoid the hassle of trying to replace that battery.

[This message has been edited by paul144 (edited July 27, 2004).]</font>