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).