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PC680 battery

 
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dljinia(at)yahoo.com
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PostPosted: Mon Jan 16, 2006 6:26 pm    Post subject: PC680 battery Reply with quote

Group:
I purchased a new PC680 battery a year ago with the
intent of replacing the year old (now 2 year old)
PC680 in my RV7A. Well, I didn't. I had mounted the
ground lug that goes through the firewall too low and
it was going to be in the way to replace the battery
without moving the lug.

Long story shorter, I've pulled my engine and sent
back to Aero Sport to get the crankshaft replaced in
compliance with SB566. I intend to now replace the
battery (and move the ground lug higher).

The question, should I use the new battery that has
been sitting on the shelf in the hanger for over a
year without any attention or do I need to buy another
"fresh" one?

Is there anything I should check?

Thanks,
Doug -7A 260hrs


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BigD(at)DaveMorris.com
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PostPosted: Mon Jan 16, 2006 6:53 pm    Post subject: PC680 battery Reply with quote

http://www.aeroelectric.com/articles/battest.pdf

Dave Morris

At 08:26 PM 1/16/2006, you wrote:
Quote:


Group:
I purchased a new PC680 battery a year ago with the
intent of replacing the year old (now 2 year old)
PC680 in my RV7A. Well, I didn't. I had mounted the
ground lug that goes through the firewall too low and
it was going to be in the way to replace the battery
without moving the lug.

Long story shorter, I've pulled my engine and sent
back to Aero Sport to get the crankshaft replaced in
compliance with SB566. I intend to now replace the
battery (and move the ground lug higher).

The question, should I use the new battery that has
been sitting on the shelf in the hanger for over a
year without any attention or do I need to buy another
"fresh" one?

Is there anything I should check?

Thanks,
Doug -7A 260hrs




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Ed Anderson



Joined: 10 Jan 2006
Posts: 475

PostPosted: Mon Jan 16, 2006 7:29 pm    Post subject: PC680 battery Reply with quote

Doug,

The website on odyssey batteries state that if it was fully charged when
stored it has a shelf life of two years. See note off their website below:

Guaranteed longer service life - The ODYSSEY battery, with a ten year
design life and a three-to-eight year service life, saves you time and money
because you do not have to replace your battery as often. It is also the
ONLY battery that is capable of delivering a large number of deep cycles -
up to 400 when fully discharged or up to 500 when discharged to 80%. Plus,
the battery is specially designed for high vibration applications.
Longer storage life - Unlike conventional batteries that need to be
recharged every six to twelve weeks, the ODYSSEY battery, when fully
charged , can be stored for up to 2 years at room temperature (25C, 77F).
At lower temperatures, storage times will be even longer.

Ed A

---


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_________________
Ed Anderson
Rv-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com
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nuckollsr(at)cox.net
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PostPosted: Tue Jan 17, 2006 6:20 am    Post subject: PC680 battery Reply with quote

At 08:52 PM 1/16/2006 -0600, you wrote:

Quote:

<BigD(at)DaveMorris.com>

http://www.aeroelectric.com/articles/battest.pdf

The battery test suggested in the above article is a
COMPARATIVE test intended to measure degradation of your
used battery as compared with new.

It's not designed for nor capable of offering measured
values of capacity.

What is/was your stored battery's terminal voltage before
you put it on a charger? If above 12.5 volts, it probably
possesses near new capacity. But the only way to know for
sure is to test it with reasonably calibrated equipment.

I'd do a cranking test with an instrument commonly found
in service stations. See

http://www.aeroelectric.com/Pictures/Tools/HF91129_4.jpg

for a low cost offering by Harbor Freight. Put a load
on the battery for pulls the voltage down to 9 volts
for 15 seconds. Observe current delivered at the end of 15
seconds. It should be 300A or better.

Recharge the battery and do a capacity test using some
tool like:

http://westmountainradio.com/CBA_ham.htm

I've purchased several of these for use in various
jobs and I keep one on the shelf in my shop. If you
don't want to invest in such tools, AND the battery
meets the cranking test at your local battery service
shop, then go ahead and install it. On some nice
VFR clear day, drop to battery-only operations and see
how long the battery will run your endurance loads
without dropping below 11 volts.

Be aware that advertised service life numbers for
batteries are a mixture of lab tests extrapolated
to the real world conditions and/or wishful marketing
hype. The real service life of a battery is strongly
influenced by your battery's real-world experiences
and the phase of the moon when the battery was built
(just kidding . . . slightly. Building batteries
is like baking cakes. The cook can have a bad day
in the most prestigious of battery factories. Hawker
went through a protracted bout of low quality jelly-roll
cells a couple of years ago).

Marketing literature is not a substitute for directly
measuring a battery's performance capabilities.

Bob . . .

Quote:
Dave Morris

At 08:26 PM 1/16/2006, you wrote:
>
>
>Group:
> I purchased a new PC680 battery a year ago with the
>intent of replacing the year old (now 2 year old)
>PC680 in my RV7A. Well, I didn't. I had mounted the
>ground lug that goes through the firewall too low and
>it was going to be in the way to replace the battery
>without moving the lug.
>
>Long story shorter, I've pulled my engine and sent
>back to Aero Sport to get the crankshaft replaced in
>compliance with SB566. I intend to now replace the
>battery (and move the ground lug higher).
>
>The question, should I use the new battery that has
>been sitting on the shelf in the hanger for over a
>year without any attention or do I need to buy another
>"fresh" one?
>
>Is there anything I should check?
>
>Thanks,
>Doug -7A 260hrs


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