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nuckolls.bob(at)aeroelect
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 Posted: Fri Oct 11, 2019 8:50 am Post subject: Odyssey Batteries |
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At 06:38 PM 10/10/2019, you wrote:
| Quote: | --> AeroElectric-List message posted by: Kelly McMullen <kellym(at)aviating.com>
Yes that is the document for reconditioning. It does not discuss the most common cause of decreased capacity. I didn't search for the discussion, but recall quite a bit about folks on Vans Air Force experiencing very short life, say under 2 yrs, with Odyssey batteries from using maintainers that were not optimized for AGM batteries. |
Color me skeptical . . .
On one hand, svla batteries and 'pure lead'
products are marketed as the super-
robust direct replacement for flooded
cell batteries.
Quoting from their website:
[img]cid:.0[/img]
They go to great lengths to promote
maintenance-free features of the
gas-recombinant chemistry. I don't know
what that 'overall power' quality is.
On the other hand, I observe no disclaimer
stating that "3 times the life" can only be achieved
by visiting this website where we read:
"BatteryMINDers® from VDC Electronics are guaranteed
to double or triple the life of most batteries
while improving their performance.
To suggest that a battery maintainer
should be "optimized" for AGM is
not supported by the numbers.
A pre-mature failure of a battery stored
on a maintainer calls for verification
the maintainer's ability to support
ANY battery.
I've owned dozens of SVLA batteries
of all sizes that were maintained on
generic Batter Minders/Battery Tenders
for YEARS with no appreciable loss of
capacity much less total failure.
I recall an Enersys admonition some
years back suggesting that their house
holy-watered maintainer should be used
to optimize service life of their
products. But like all medicine-show
promotions, they offered no numbers
or operational profiles explaining
how their maintainer differed from a
Battery Tender or a Schumacher product.
Nor did they offer any explanation of
the differential physics of AGM vs.
flooded that begged for special
treatment.
Battery failure is an inarguable fact . . .
but too often, deduction of cause-
effect-and-remedy are not supported
by the physics.
Suspicion is warranted when conflicting
philosophies are offered by factions
of the same industry. Good example:
There's a constellation of battery
'desulfation' devices on the market,
some are even patented. Still more
variants are described in popular DIY
literature. Each claims to apply
the 'magic' hammer that breaks up
lead-sulfate molecules thus restoring
teh battery's original function.
To date, I've seen no laboratory study
on the efficacy of any particular technique.
A few months ago, I purchased a Battery
Minder Plus . . .
https://tinyurl.com/y2gtxl7q
. . . fellow Lister Steve Stearns
sent me a soggy svla battery as
a test article for evaluating my
new purchase. I've been doing
short and long (5 mos) term testing
and will publish the results when
I get time . . . don't expect any
fireworks or joyous bell ringing.
In the mean time, if you've got a
battery maintainer of ANY stripe,
don't pitch it to buy some super-
whizzy battery maintenance product.
Measure the terminal voltage of your
'stored' battery after say, a week
or more on your existing maintainer.
If the voltage is 12.9 to 13.4 then
it's just fine . . . no matter what
kind of lead-acid battery you have.
I just checked Steve's test article
after 3+ months . . . it's 13.19
volts. I think the 'new and improved'
Battery Minder is probably an adequate
maintainer . . . but its restorative
qualities, if any, are yet to be
demonstrated.
Bob . . .
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nuckolls.bob(at)aeroelect
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| Posted: Mon Oct 14, 2019 8:40 am Post subject: Odyssey Batteries |
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At 07:13 PM 10/13/2019, you wrote:
| Quote: | So Bob, (congratulations, by the way),
the below captioned article seems to be relative to a sulfated battery
in an attempt to revitalize a battery that has been potentially abused. |
Yes, I asked the question about that article because
it was the only one I found on the Odyssey site
that spoke to battery maintenance. There was
an earlier posting that cited an article about
'premature failure' of Odyssey batteries allegedly
caused by poor storage. I was unable to find such
an article.
| Quote: | | If left untouched for relatively long periods of time since the discharge rate is small, is it necessary to do anything? |
Generally no. However, 'long periods of time'
is not quantified . . . nor are the conditions
under which the aircraft is stored. I had a
pretty good wrestling match with the warehouse
managers at Hawker Beech who were not interested
in building battery storage racks with maintainers.
The hot, Dallas TX warehouses were killing brand
new, multi-killobuck batteries due to higher rates
of self discharge and self-destruction at high
temperature.
As to advertised self discharge rates we read:
https://tinyurl.com/y52e8zmx
[img]cid:.0[/img]
This is a poorly worded assertion . . .
'which ever occurs first'? Does this paragraph
imply that a 12v condition MIGHT be experienced
in less that 2 years. The paragraph should
be edited or eliminated. It offers no
helpful information.
A battery that has self-discharged to 12.00
has zero capacity . . . it's not damaged and
will recover gracefully but it won't start
an engine. Further, an extended slow-decay
has to be sulfation unfriendly.
For our purposes, and airplane that's
flown say, once a month, would not benefit
from application of a charger-maintainer
to keep the ship in flight-ready condition.
The effects of longer storage and/or extreme
conditions will be mitigated 100% by use
of a true, battery charger-maintainer.
| Quote: | Do the appropriate chargers protect against this sulfation if left
on as a trickle? |
This day and age there should be no such
critter as a 'trickle' charger. This is
an arcane term for a device that never
stops adding energy to a battery with some
notion of offsetting self discharge
conditions. A legacy trickle charger will
kill an SVLA battery.
Today we look for MAINTAINERS that automatically
drop from a top-off charging mode to a
maintenance mode. Maintenance is defined as
application of a fixed voltage to the battery
that is just above the open circuit terminal
voltage. This voltage is incapable of damaging
a battery because it does not charge the battery.
It only shoulders what ever self-discharge
currents exist inside the battery.
https://tinyurl.com/k6xr9mk
| Quote: | | also at what battery voltage level should external charging be appropriate? |
No charging . . . MAINTAINING. 12.9 to 13.4
is fine . . . I have one maintainer that
supports at 13.6 . . . and that's okay too.
13.6 volts will not charge a battery.
I've used charger-maintainers by Battery
Minder, Battery Tender and Schumacher for
decades with most satisfactory performance.
As to 'sulfation', a Google search of
of the Odyssey battery site yields a
single mention, a remedy for which is
discussed in the article I queried
earlier.
https://tinyurl.com/yykpaf7n
Bob . . .
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argoldman(at)aol.com
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| Posted: Mon Oct 14, 2019 12:00 pm Post subject: Odyssey Batteries |
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thanks Bob
--
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