Chris, Burmix & MeandMyShadow,
Thanks for your replies. No, I haven't tried switching the batteries but I'll do that. I removed the battery while on as Burmix recommended and the BC6000 is charging now.
My phones are several years old so I probably have to use MMS suggestion of keying in
9-#-9-#-9-*-6-5-5-OK. Will this reset the base and erase its contents?
I think the charging contacts are OK because I can leave the phone on, not on the base unit, and it remains on until I try to make a call, etc. So the battery seems to be holding the charge.
Jose