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- From: waterman@chaos.cs.brandeis.edu (T.S. Waterman)
- Subject: Re: Can my T1000SE battery be revived?
- Message-ID: <waterman.721008108@chaos.cs.brandeis.edu>
- Sender: news@news.cs.brandeis.edu (USENET News System)
- Reply-To: waterman@cs.brandeis.edu
- Organization: CAVEAT Labs, Inc.
- References: <WBE.92Nov2014821@crystal.bbn.com>
- Distribution: usa
- Date: Fri, 6 Nov 1992 00:01:48 GMT
- Lines: 35
-
- wbe@bbn.com (Winston Edmond) writes:
-
- > My T1000SE's battery pack stopped holding a charge a while back. The
- >"standard" revival tricks had helped a bit in the past, but aren't helping
- >any more.
-
- What are the "standard" methods which you used?
-
- >This weekend, I put a voltmeter on it and found not the 7.2V it
- >ought to have, but 4.8V (4 * 1.2V). After some deep discharge and recharge
- >cycles, I lucked out slightly and it went up to 6.0V (5 * 1.2V). After more
- >of the same, I got unlucky -- now it only charges to 2.4V.
-
- >1. Can this battery pack be brought back to life (7.2V)? If so, how?
-
- >2. If not, is it possible to replace the NiCad batteries in the pack with
- > other, off-the-shelf NiCad batteries (e.g., Millenium)? Is there
- > anything tricky about doing so?
-
- I have two ideas:
- 1) Duracell has recently introduced a line of nickel hydride batteries specifically
- to replace laptop batteries. You might be able to pick up one of these
- and increase your battery operating time, too.
-
- 2) One of the failure modes of NiCad batteries is the buildup of plated
- metal paths through the electrolyte, from one electrode to the other.
- A common way to cure this is to "blast" the paths out, by putting
- the battery in series with a high current/low resistence power
- supply. A large capacitor (50-200 mF) charged to 8V or so
- is perfect for this. I've found this works best if the battery
- is completely discharged.
-
- --ts
- No warranty expressed or implied.
-
-