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From: "Phil Allison"
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>
Subject: Re: Difference between AC adapter and charger?
X-Newsreader: Microsoft Outlook Express 5.50.4522.1200
Date: Thu, 24 Oct 2002 11:19:49 +1000
NNTP-Posting-Date: Thu, 24 Oct 2002 11:11:05 EST
Organization: Telstra BigPond Internet Services (http://www.bigpond.com)
"Keith R. Williams" wrote in message
> That part works too. The "memory effect" hasn't been seen for
> twenty years. The "memory effect", or more properly "voltage
> depression" issues were solved back in the early 80s.
** You have been contrdicted on this point countless times - are you a
> *NEVER* drain a multi-cell NiCd pack to zero! To equalize cells
> charge them fully, perhaps a bit of an over-charge. Cheap NiCd
> chargers bake the living daylights out of the poor things.
** Some do some don't.
> Intermediate chargers look for the negative dV/dt, which isn't
> fool proof. Good chargers monitor the cell temperature to shift
> from charge to float (or better - off).
**That is far from foolproof too.
> This has *nothing* to do with the so-called "memory" effect
> though. This effect does *not* exist in modern cells to any
> detectable extent. Most people blame the "memory effect" for
> packs that were ruined by reverse charged cells.
** Add to that overcharged cells that lose their water, high self
discharge cells that never come up to the charge in a pack and shorted cells
due to long storagae and old age.
. . . . .. .............. Phil
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