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From: Keith R. Williams
Subject: Re: Difference between AC adapter and charger?
Date: Wed, 23 Oct 2002 20:52:35 -0400
References: <0001HW.B9D43FDF0325BBB11662EAD0@news.covad.net> <0001HW.B9D4EE870344BA681662EAD0@news.covad.net> <3DB01FBB.EAF744F9@usa.net> <0001HW.B9D572FB034E39101662EAD0@news.covad.net> <3DB02E27.email@example.com> <3DB2A987.FA0DD93E@usa.net> <7vSs9.669$ZO3.52300@newsfep2-gui>
X-Newsreader: MicroPlanet Gravity v2.60
In article ,
> "The Happy Hippy" wrote in message
> > "Phil Allison" wrote ...
> > > Once a pack becomes unevenly charged it is next to impossible
> > to> even it out without access to each cell.
> > >
> > > The only way to get good results from a Ni-Cd pack is to
> > > it fully each time it is used and leave it in a flat condition until it
> > > needed again - then charge it. As this does not suit the vast majority
> > > non-professional Ni-Cd users we have all the problems.
> > Everything you have said in the thread makes good sense to me Phil; can I
> > ask you to clarify one point ...
> > Is there any problem with leaving NiCd batteries in a flat condition for a
> > prolonged period of time ? What's 'prolonged' ?
> ** They should rest with 1.2 volts on each cell - not zero.
That's fully charged! They should never be run down below
.9v/cell, but 1.2V?
> They can survive a long time like that. But if you did not want
> to use them regularly then why the heck do you buy them ?
They can survive at 0V, just don't run them down there in a
multiple cell pack. For long term storage, let them self
discharge and let them be. NiCds and NiMH technology is quite the
opposite of lead-acid!
> > I have read that lack of use is a problem with rechargeables, and they
> > should be charged and used ( discharged ) regularly ( weekly was
> > uggested ) to keep them working nicely.
> ** The different chemistries have vastly different issues. A lead
> acid cell must not be left in a fully discharged state or it will corrode
Indeed. A NiCd or NiMH can be left in the discharged state, as
long as it is *never* reversed-charged to more than .1V/cell.
> How to do that, when not actually needing to use 40-odd batteries most of
> the time has always intrigued me.
> ** Laeve the Ni-Cds flat and the SLAs on trickle - simple.
Agreed! Absolutely. We have an issue with the inbetweens.
BTW, your posting technique is so non-standard it's very hard to
follow! Thre are standards in this medium. ...and they work.
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