Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/18/84 SMI; site sun.uucp
Path: utzoo!watmath!clyde!bonnie!akgua!whuxlm!harpo!decvax!decwrl!sun!wmb
From: wmb@sun.uucp (Mitch Bradley)
Newsgroups: net.analog
Subject: Re: Electronics wearing out
Message-ID: <2359@sun.uucp>
Date: Fri, 28-Jun-85 00:10:02 EDT
Article-I.D.: sun.2359
Posted: Fri Jun 28 00:10:02 1985
Date-Received: Mon, 1-Jul-85 06:28:43 EDT
References: <2663@decwrl.UUCP> <508@edison.UUCP> <172@almsa-1> <221@unccvax.UUCP> <657@lll-crg.ARPA> <616@umd5.UUCP>
Reply-To: wmb@sun.UUCP (Mitch Bradley)
Organization: Sun Microsystems, Inc.
Lines: 9
Summary: 


Instead of putting a new battery in parallel with the old one,
then removing the old one, you could first connect a capacitor
across the RAM, disconnect the old battery, then connect the new
battery. That ought to prevent any danger of the new battery charging
the old one.  You could just leave the capacitor connected if you
wanted to.  If you are reasonably quick, 10 microfarads ought to
be enough, assuming that the RAM is really low power (it probably is
if the battery lasts 7 years).