[DeTomaso] Reconditioning dead batteries

[Sean Korb]

How do the electronic desulfating chargers work?  Can I fake it with a
555 timer and accumulator triggering a SPDT relay from ummmm... my
car's charging system through the 25A cigarette lighter?  I was
thinking driving it around would help for agitation.  Just anchor it
in the trunk for a week or so of commuting.

Or, you know, I could buy the right tool.  I've always been curious
how it works but I heard it was a square wave of high amperage pulses
, 5A to 12A?

sean

On 10/29/19, j g via DeTomaso <detomaso at server.detomasolist.com> wrote:
>    I Can remember a day back in the 1960's where every service station
>    used to actually fill your tank, sell tires , batteries etc: Gasoline
>    was 7 cents a gallon and 3 cents was taxes.
>
>    During that time frame  there was a whole after market industry that
>    did what was called "rebuild a battery" .   I can remember going  to
>    one of these rebuild facilities in the  area we lived in.
>     In the least case the battery was drained flushed  vibrated to
>    dislodge any material that has fallen off the plates and then
>    re-flushed. Filled with new acid solution and an additive containing a
>    cadmium salt, The batteries were let sit for over night then charged
>    and discharged rapidly for a couple of times then put on a normal
>    charge, (10-25A)  this usually fixed the battery back to a level it
>    could last a couple of years sometimes . ( we used rebuilder batteries
>    on all the farm equipment and  the older cars)  A large percentage of
>    the batteries returned for rebuild by the stations fell into this
>    category. They  were sold at a relaxed price compared to a new one and
>    usually had a 30 day warranty ( My grandfather worked at  a service
>    station as a do it all guy in the small town).
>    Sometimes this was done with the re builder  company removing the whole
>    top or bottom  of the battery case then re fusing it on when all the
>    mechanical stuff and flushing was completed .  when the bottom was cut
>    off the batteries if i remember correctly they were pressure flushed
>    and the whole plate stack was inspected and then went through a couple
>    of washes in a agitated tank  then to the next and finally into a tank
>    that had a cadmium salt additive and a slow current applied between the
>    battery plates ( terminal ) and the Cadmium Bath and held for some time
>    (4 hours if i remember from me  sitting there over many days ).   They
>    did replace plates or whole cells from  other junked batteries that had
>    come in as unservicable sometimes or  in the premium battery new cells
>    as applicable to price ,  The batteries were  then refused with their
>    tops or bases  ( some kind of  thick tar like  goo)  and  tested for
>    leaks  after a cure time , a couple of days in a big area.  The high
>    end of the rebuilder batteries  were still about half the cost of the
>    same battery new.  One reason my grand father swore by the batteries is
>    because they let him pick the guts he was going to put into the battery
>    as well as help by doing a lot of the work on his battery and he would
>    try and pack as many plates as he could in each cell from other
>    batteries . This made starting a tractor much easier. Sure was
>    different when you could go into a  factory doing repair work and
>    actually see what was going on.
>    MY take by me  using either EDTA or Cadmium based additives is that
>    most batteries can be brought back without ever taking them apart , I
>    do individual cell high rate charging and the whole battery crow bar
>    short testing  , Usually can get 6 to 7 years out of a lawn and garden
>    tractor and 11 to 12 years out of a low end  car battery. The
>    electronic desulate chargers do work and unless there is large crap
>    shorting cells  in the bottom  I have had very good success in this, (
>    I do have a very good materials science education and engineering/
>    Physics graduate paper)
>    jg
>
>    On Tuesday, October 29, 2019, 10:16:42 AM CDT, marshallgsmith
>    <marshallgsmith at sbcglobal.net> wrote:
>      Good morning everyone,
>      Has anyone had any experience with the current marketing campaign on
>      the procedure to recondition dead batteries?
>      I was convinced it was a scam but it continues to surface.
>      Thank you and an early happy Halloween to everyone!
>      Marshall
>      Sent from my Verizon, Samsung Galaxy smartphone
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-- 
Sean Korb spkorb at gmail.com http://spkorb.org (est 1994)
"Computers are useless.  They can only give you answers." -P. Picasso