The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
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.firstname.lastname@example.org> <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.
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup