Dallas battery replacement -- what is it?

Forgive me for asking, but would someone please reply OFFLINE to me with an answer to this question -- what is this Dallas battery replacement that a bunch of notes were about? I somehow missed (did not read) the start of it, and just to educate my mind (put it at rest), I would like to know what you are in fact talking about. Why should I know about this? Thank you. Cheers. Kevin * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Kevin L. Anderson Ph.D., Geography Department, Augustana College Rock Island, Illinois 61201-2296, USA phone: (309) 794-7325 e-mail: kla(a)helios.augustana.edu -or- gganderson(a)augustana.edu * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Opinions expressed here are my own and do not represent the administration of Augustana College.