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deej(at)deej.net
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 Posted: Thu May 22, 2014 9:14 am Post subject: Battery choice |
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I'm trying to decide on a battery. Many people are using the Odyssey
PC680 with good results. It is a somewhat expensive battery:
http://www.apexbattery.com/odyssey-pc680-marine-battery-marine-batteries-odyssey-marine-batteries.html?utm_source=googlepepla&utm_medium=adwords&id=18283950120&gclid=CIaiifviv74CFXRo7AodqxYANA
In our UPS units we use a UB12180 battery (or equivalent), which is 1/3
the cost of the PC680 and has better specs:
http://www.apexbattery.com/abiomed-bvs-5000-biventricular-support-battery-sealed-lead-acid-batteries-abiomed-batteries.html
Are there any reasons why I should not be using this battery in my
aircraft?
My battery is mounted in the tail section, and it is not exposed to the
direct heat and vibration of the engine compartment, if that makes any
difference.
-Dj
--
Dj Merrill - N1JOV - VP EAA Chapter 87
Sportsman 2+2 Builder #7118 N421DJ - http://deej.net/sportsman/
Glastar Flyer N866RH - http://deej.net/glastar/
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ceengland7(at)gmail.com
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| Posted: Thu May 22, 2014 9:57 am Post subject: Battery choice |
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On 5/22/2014 12:13 PM, Dj Merrill wrote:
wheelchair/scooter batteries' chemistry is tweaked a bit differently
from starting batteries. They are intended to be discharged somewhat
slower, with deeper discharge (think 'marine' battery), but struggle a
bit to deliver high short term bursts of energy, like you need to start
a big engine. The easy way to spot the difference (if you can get full
specs) is to compare the internal resistance numbers. For starting,
lower is better. Another, less reliable way is to just look at the
terminals. Many UPS batteries have terminals that are much too small to
handle 200+ amps. I've been using 'brand-x' batteries in my planes for
many years, & my experience is that some of the 18 AH rated batteries
like the one you linked might struggle just a bit with a higher
compression a/c engine, but you can usually buy a 20AH or 22AH model
from the same series with almost identical case size, & it will provide
almost enough 'grunt' to taxi the plane with the starter.  Price is
still much lower than the Odyssey. Model number will be something like
'12200' or '12220' instead of 12180 (the 18 indicated the AH rating).
Most on-line battery sales operations now sell 'brand x'
motorcycle/watercraft/etc starting batteries that are drop-in
replacements for the Odyssey; that's the easiest way to get a suitable
substitute at a lower price.
FWIW,
Charlie
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nuckolls.bob(at)aeroelect
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| Posted: Thu May 22, 2014 10:05 am Post subject: Battery choice |
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In our UPS units we use a UB12180 battery (or equivalent), which is 1/3
the cost of the PC680 and has better specs:
http://www.apexbattery.com/abiomed-bvs-5000-biventricular-support-battery-sealed-lead-acid-batteries-abiomed-batteries.html
Are there any reasons why I should not be using this battery in my aircraft?
None that I can think of . . . without a doubt
the freshly installed battery will perform
satisfactorily. The 18 Ah battery and form-factor
have proven adequate to a huge segment
of OBAM aircraft. The question that nobody can
answer is cost of ownership for this battery.
Figure sale price + shipping + maintenance costs
for the less expensive battery. Is it likely that
the more expensive battery will have a lower cost
per flight hour than 3x the cheaper one? Probably
not. 2x the cheaper one? Again, probably not. But
that assertion is not supported with any data for
either robustness + your working environment +
possibly replacing the battery after cap-checks
show it to be unsuitable for further flight.
The risks are low. Try the less expensive battery
and keep notes. Without having hard numbers on
relative performance to stack against numbers for
how YOU need to use the battery, nobody has the
tools to either recommend or discourage the
experiment.
Let us know what you decide and what you find out
in a year or so. Got a load tester? You might want
to own one of these things.
http://tinyurl.com/3gnnwrt
This modern incarnation of 1930's technology is to
batteries as a hammer is to nails.
Bob . . .
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jluckey(at)pacbell.net
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| Posted: Thu May 22, 2014 10:11 am Post subject: Battery choice |
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DJ,
I wonder if those stats for the cheaper battery are a little "optimistic"?
-Jeff
From: Dj Merrill <deej(at)deej.net>
To: aeroelectric-list(at)matronics.com
Sent: Thursday, May 22, 2014 10:13 AM
Subject: AeroElectric-List: Battery choice
--> AeroElectric-List message posted by: Dj Merrill <deej(at)deej.net (deej(at)deej.net)>
I'm trying to decide on a battery. Many people are using the Odyssey
PC680 with good results. It is a somewhat expensive battery:
http://www.apexbattery.com/odyssey-pc680-marine-battery-marine-batteries-odyssey-marine-batteries.html?utm_source=googlepepla&utm_medium=adwords&id=18283950120&gclid=CIaiifviv74CFXRo7AodqxYANA
In our UPS units we use a UB12180 battery (or equivalent), which is 1/3
the cost of the PC680 and has better specs:
http://www.apexbattery.com/abiomed-bvs-5000-biventricular-support-battery-sealed-lead-acid-batteries-abiomed-batteries.html
Are there any reasons why I should not be using this battery in my
aircraft?
My battery is mounted in the tail section, and it is not exposed to the
direct heat and vibration of the engine compartment, if that makes any
difference.
-Dj
--
Dj Merrill - N1JOV - VP EAA Chapter 87
Sportsman 2+2 Builder #7118 N421DJ - http://deej.net/sportsman/
Glastar Flyer N866RH - [url=http://deej.net/glastar --> http://forums.matronbsp; Thank you for your generous nbsp; -Matt Dralle, List Admin.<b======
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deej(at)deej.net
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| Posted: Thu May 22, 2014 5:19 pm Post subject: Battery choice |
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On 5/22/2014 1:56 PM, Charlie England wrote:
| Quote: | but you can usually buy a 20AH or 22AH model from the same series with
almost identical case size, & it will provide almost enough 'grunt' to
taxi the plane with the starter. Price is still much lower than
the Odyssey. Model number will be something like '12200' or '12220'
instead of 12180 (the 18 indicated the AH rating).
|
Charlie,
Good advice, thanks!
$44 including shipping from Amazon for the UB12220 battery, 12v 22Ah in
the same form factor.
A plus is that it is 9 lbs lighter than the 25 Ah battery it will be
replacing (a B and C model BC110-1).
Bob,
I will report back to the list as to how it performs. I have a low
compression 150hp Lycoming O-320 with a light weight starter, so it
should hopefully turn it over with no difficulty.
-Dj
--
Dj Merrill - N1JOV - VP EAA Chapter 87
Sportsman 2+2 Builder #7118 N421DJ - http://deej.net/sportsman/
Glastar Flyer N866RH - http://deej.net/glastar/
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ronburnett(at)charter.net
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| Posted: Sun May 25, 2014 3:27 am Post subject: Battery choice |
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I buy my Odessey 680 at Wholesale Battery and the,last one was $110. See if there is one near you. They have good alkaline batts at good prices also, AA 9 volt, etc.
Ron Burnett
STL area
Sent from my iPad
May you have the blessings of the Lord today.
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