tools. At least that's what the fellow told me in November last year.
Could be the packs you brought in were not
screwed together, rather a glued-up box? At least that was the kicker for my
Batteries Plus store. Tom
True, I was just referring to the subthread complaint about a particular
shop somewhere that was unable (or at least unwilling) to tackle a
It could also be the Ol' "reverse zap" method. Using a 12v car battery, zap
the NiCad for a split-second with the polarity reversed. ie. +ve cable to
+ve terminal on car-battery *and* NiCAD, -ve to -ve. I zap 'em two or three
times, with pauses in-between to ensure nothing over-heats.
I've done this several times with NiCads that were past their prime, and it
works, ort of. About 1/4 of the NiCads I've done to date recovered and
worked well for a while, about another 1/4 recharged OK once or twice then
turned toes up again and the rest stayed parrots.
As they were cactus dominictus anyway, I wasn't concerned about damaging
'em *but* I've learned a thing or two since then and have stopped doing it.
Damaging the car battery is a very real possibilty... so are exploding
NiCads. Be warned, it ain't worth it.
I emailed the owner and asked:
Hello Rick, just to let you know, your auction for the battery technique
is being discussed in rec.woodworking... You could pop in there and
explain it as a genuine way to save memory choked batteries if you want,
but if what you are selling is merely a link to site that shows a way to
connect wires in a specific way and it works, do you think it is really
worth $12.95? --(me)
I am the president of Unique Dynamics, Inc. that has copyright and patent
Resurrection? Is this the "Second Coming"?
Seems over the top and awfully pretentious. What procedure for TRYING
to save a bad battery pack warrants a patent? When I've had bad battery
packs, I've found dead cells. There's no hocus pocus that's gonna bring
those dead cells back to life.
Was it PT Barnum that said...?
Any chance the "feedback" is bogus?
Even if Doug gets an email back, why couldn't it be coming from a shill?
Google on "revive NiCad battery" and you'll discover that (apparently) there
*is* such hocus pocus.
Of course. However, there's an awful lot of it. Which means that someone went
to an awful lot of trouble to create it.
I did get one response. Yes, it could be coming from a shill. Doesn't sound
like it IMO, though:
"Hello! Yes, it works well-but not on all batteries. Firstly, you need to be
able to access the individual cells. Using a 10-12 volt source battery(9 is
too weak I've found) you "zap" each dead cell-most are revived and can then be
charged. Some won't work at all and some don't hold it. However, the first
one (an 18 volt Milwaukee battery) that had several bad cells has held 20
volts for several weeks. Others have not held it. You can always take the
remaining good cells from an otherwise bad battery overall for use later
(SOLDERING SKILLS HELP). He also has a new "quick" method that is easier but
doesn't always work. Easily worth the $13 for one battery if you ask me. "
Doug Miller (alphageek at milmac dot com)
Its nothing to do with the voltage, a supply as low as approx 1.5v
would easily suffice, its current you need - lots of it. Basically you
are removing internal hair like growths that short the positive and
negative sides of the individual cells.
On the "memory effect", if correctly applied it only occurred in *ONE*
specific application back in the 1960's (a communications satellite)
that precisely controlled charge and discharge cycles. A similar
effect is observed by the consumer but its not memory effect.
Read the Nicad faq for the full story (yes I know it says memory
effect does occur but its just semantics)
Well, when I worked in a biomedical engineering lab years ago, we had a
battery rejuvinator for NiCd defib batteries. It'd do a milliamp-hour
check first, then do it's cycle pattern, and then do another analysis
afterwards. Some batteries got drastically better, some stayed bad.
So, from this, I deduce that memory effect _is_ real in NiCd, and given
the proper equipment and/or technique, you _can_ get some of them back.
Right, that technique has been around forever. I can see how he claims
copyright for his procedure document, but the fact that he claims to
hold patent in the auction, yet his site says "patent pending", shows
that something is fishy. The medical-grade battery rejuvinators use a
charge/discharge cycle pattern rather than a capacitive discharge into
the battery, by the way. Physio-Control was/is the manufacturer, if
you're interested in googling for details.
Maybe, but probably the same "discharge a cap into it and hope for the
best" that you'll find for free with any search engine.
If you've gotten grain growth in the Cadmium plate, it may be possible
to run the battery down and recharge it at the optimal rate to reform
the crystal structure. If you've gotten dendrite growth, you can fry
the dendrites that are shorting the battery (zap!), but there is a high
liklihood that the problem will recur.
In addition, there are other ways to damage batteries so that they don't
produce the expected level of output that are permanent. The rejuvenator
you describe sounds like something sophisticated that will actually do
the job when it can be done. Randomly trying to run the battery completely
down (as some might try) is a crap shoot.
The response from the seller sounds a lot like he is trying to sell you
Michael and MJ Houghton | Herveus d'Ormonde and Megan O'Donnelly
firstname.lastname@example.org | White Wolf and the Phoenix
For the record, neither the copyright or the patent office verifies that
something works, just that it's unique enough. I have no information or
comment on whatever this process is, but I want to point out that that
doesn't mean it's been validated by those offices.
Me, I'll stick with Batteries Plus.
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