Marine batteries/4X4's
Olympic Games
track lighting, electric windows, trolling motors and such from your
battery, a big deep cycle marine battery is the cat"s meow.
He claims that the thinner plates in a marine battery actually
handles shock and vibration better than the conventional batteries
(somebody explain the science to me please).
The main problem would be fitting the thing in the battery box, and
getting the cables to reach.
Do you believe it, or not?
ericrodi
Games at Olym...@webtv.net wrote on 6/27/00 1:01 AM:
> This is the scoop from the Exide Battery man
Just keep in mind the Exide man gets paid to sell Exide batteries.
Roger Brown
I think you may have the thick/thin part swapped, deep-cycle-type batteries
have thicker plates to stand up to deep discharge cycles, while starting
batteries have thinner plates for more surface area and starting current.
Marine batteries are sort of a combination deep-cycle/starting battery, so are
a decent choice for this application. Usually they have different connections
for the cables.
Peter D. Hipson
<rog...@pisco.engr.sgi.com> wrote:
>
>I think you may have the thick/thin part swapped, deep-cycle-type batteries
>have thicker plates to stand up to deep discharge cycles, while starting
>batteries have thinner plates for more surface area and starting current.
Gee you learn something new every time... <g> You may want to research
this one a bit more... Look into what happens when a 'deep discharge
cycle' happens, and what it does to the plates.
Roger Brown
For sure, as any lead acid battery is discharged, the plates thin out, pull a
starting battery too low and it won't be able to be recharged. A deep cycle
battery has thicker plates to tolerate deep discharges.
If you look at:
http://www.ee.ualberta.ca/~schmaus/dcbat.html
"Car batteries are especially designed for high initial cranking amps
(usually for five seconds) to start a car and no deep cycle discharges.
Deep cycle (and marine) batteries are designed for prolonged discharges at
lower amperage. [The plates in car battery are more porous and thinner
than in a deep cycle battery.] A deep cycle battery will typically outlast
two to four car batteries used in deep cycle applications. A "dual marine"
battery is a compromise between a car and deep cycle battery and is used
to start small engines and to provide deep cycle discharge capability. "
Jerry Bransford
designed for deep-cycle operations like winching or other heavy-draw
devices, is also a combination type battery that serves as a great
starting battery as well. Deep cycle batteries lend themselves to tasks
like winching, ambulance and police service, etc. so your Exide guy was
mostly right on. I don't think I'd go with strictly a marine deep cycle
battery though, I'd go for an Optima Yellow Top for those applications
since it is also shock-proof and literally maintenance free.
Jerry
--
Jerry Bransford
PP-ASEL KC6TAY
The Zen Hotdog... make me one with everything!
Geezer Jeep: http://www.jjournal.net/jeep/gallery/JBransfordsTJ/
rick
the red top is not bad either but it is not designed for marine
enviroments. they both are leak proof and shock proof however, due to
there totally diff design from a conventional battery with plates. they
both have very little if any wetness to them, and not plates per say as
in the conventional batteries. what they have is six sealed cylinder
shaped wound cells, of acid impregnated/ and absorbing matting. and
that is the key to there leak proof shock proof and multi mounting
position design. as they charge and discharge they loose small amounts
of the liquid/vapor acid from the matting into the sealed cells and then
reabsorb it when not charging. they are not however GEL CELL sealed type
batteries. those are similar to conventional batteries with plates but
the acid is in a gel form around the plates and is less likely to leak.
and are shock resistent due to the gel cushioning. and can also be
mounted in multi positions.
Roger Brown
The yellow top is rated at 750amps vs. 800 for the red (and blue?) tops. One
problem with the red top is that a few deep discharges and it may not take a
charge. I've been running the Predator (no longer sold under that name, now
Hawker) starved electrolyte batteries for a few years now. I have a pair of
the small 800A batteries and have been impressed with them. I've
inadvertently drained one the other battery completly a few times and they
come back to full capacity every time. I have a solenoid connecting the pair
and can either run them independently or in parallel.
Rob Owens
ignition module which resulted in his battery draining overnight. he killed
3
optima red tops before finally getting the thing fixed. if anybody wants a
6-volt optima, i could make you a sweet deal!
-rob
>===== Original Message From rog...@sgi.com =====
Jerry Bransford
Jerry
--
Rob Owens
out! that's the result of i don't know how many complete discharges.
-rob
>===== Original Message From jer...@home.com =====
ericrodi
Hawker) starved electrolyte batteries for a few years now. I have a pair of
the small 800A batteries and have been impressed with them. >>
Regarding the Predators, those folks like to report battery capacity at room
temperature, while the rest of the industry does it at freezing temperature.
Why use room temperature? Because every battery gives significantly more
cranking amps at room temperature than at freezing temperature. By reporting
the amps at room temperature their small batteries appear to be as capable
as larger ones from other vendors to the unsuspecting consumer. Other than
that they look like good batteries, just make sure to compare oranges to
oranges when considering them.
na
actually make 6V batteries that I know of.
Travis
"Jerry Bransford" <jer...@home.com> wrote in message
news:3959438C...@home.com...
> Optima makes a 6 volt Red Top?
>
> Jerry
>
> Rob Owens wrote:
> >
> > just to reinforce the point about the red tops, a friend of mine had a
bad
> > ignition module which resulted in his battery draining overnight. he
killed
> > 3
> > optima red tops before finally getting the thing fixed. if anybody
wants a
> > 6-volt optima, i could make you a sweet deal!
> >
> > -rob
> >
> > >===== Original Message From rog...@sgi.com =====
> > >The yellow top is rated at 750amps vs. 800 for the red (and blue?)
tops. One
> > >problem with the red top is that a few deep discharges and it may not
take a
> > >charge. I've been running the Predator (no longer sold under that
name, now
> > >Hawker) starved electrolyte batteries for a few years now. I have a
pair of
Roger Brown
>
> << I've been running the Predator (no longer sold under that name, now
> Hawker) starved electrolyte batteries for a few years now. I have a pair of
> the small 800A batteries and have been impressed with them. >>
>
> temperature, while the rest of the industry does it at freezing temperature.
> Why use room temperature? Because every battery gives significantly more
> cranking amps at room temperature than at freezing temperature. By reporting
> the amps at room temperature their small batteries appear to be as capable
> as larger ones from other vendors to the unsuspecting consumer. Other than
> that they look like good batteries, just make sure to compare oranges to
> oranges when considering them.
That's the difference between Cranking Amps and Cold Cranking Amps.
I find that with a single battery the cranking is a bit slower than with the
red top Optima, but with two in parallel, its a lot faster.
Bat21
Games) wrote:
> This is the scoop from the Exide Battery man: If you run winches,
>track lighting, electric windows, trolling motors and such from your
>battery, a big deep cycle marine battery is the cat"s meow.
> He claims that the thinner plates in a marine battery actually
>handles shock and vibration better than the conventional batteries
>(somebody explain the science to me please).
> The main problem would be fitting the thing in the battery box, and
>getting the cables to reach.
> Do you believe it, or not?
i work at a battery manufacturing facility, the plates are thicker,
not thinner.. they are called high denesity plates.
the reason they perform better in extended load situations is they
have a greater surface area(of the individual molecules in the lead
oxide paste) the surface area of the plate is the same..... after
you draw the "free electrons" from the surface of the plate, then wait
for a moment, they are replaced by the "inner" areas of the plate.