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04-04-2017, 11:01 PM
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Join Date: May 2012
Location: AZ/MN
Posts: 376
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I order my batteries online through Battery Mart. My one yr old Odyssey PC680 also failed to hold a charge more than than 12.2 v. When I called to order a new one, as a side note the rep stated that Odyssey does not recommend the PC680 for aircraft use but they make the Hawker SBS J16 recommended for aircraft. Same size as PC680. Came in the mail today. $173.65 including shipping.

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Jim
RV-4 '88-'09 Built & Sold
RV-8 Purchased
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04-04-2017, 11:53 PM
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Join Date: Jan 2005
Location: Battle Ground, Washington
Posts: 138
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My PC 680 lasted 12 years
Yesterday I replaced the Odyssey PC 680 battery in my RV-8 after 12 years and 1674 hours. It has worked flawlessly and has never been on a battery tender. I installed a new one purchased from Van's. I have been very happy with the performance of this battery and have no reason to look at other batteries at this point.
Dan Miller
RV-8 N3TU
Battle Ground, WA
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04-05-2017, 03:12 AM
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Join Date: Feb 2007
Location: San Diego, CA
Posts: 1,670
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12 Years! That is impressive, for sure. 
It makes me wonder whether the PC 680's that fail early might have a small continuous drain that is unknown to the aircraft owner. [Clock, memory keep-alive, who knows what..]
I'm having trouble coming up with any other answer.
Perhaps if there was a physical switch that would Completely disconnect the battery from Everything in the aircraft, the batteries might last longer.
Just a WAG, for sure. No data whatsoever. And, YMMV!
__________________
Pete Hunt, [San Diego] VAF #1069
RV-6, RV-6A, T-6G
ATP, CFII, A&P
2020 Donation+, Gladly Sent
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04-05-2017, 06:18 AM
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Join Date: Mar 2006
Location: Newport, TN
Posts: 7,496
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The answer to many of these premature failures and why the rating changed is in the archives.
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04-05-2017, 08:41 AM
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Join Date: Oct 2011
Location: Pilot Hill, CA
Posts: 845
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Quote:
Originally Posted by springer
I order my batteries online through Battery Mart. My one yr old Odyssey PC680 also failed to hold a charge more than than 12.2 v. When I called to order a new one, as a side note the rep stated that Odyssey does not recommend the PC680 for aircraft use but they make the Hawker SBS J16 recommended for aircraft. Same size as PC680. Came in the mail today. $173.65 including shipping.

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That looks like a good alternative. Thanks Jim!
ODYSSEY Powersport Battery Model PC680 ($130.00)
Specifications:
Pulse (5-second) Hot Cranking Amps (PHCA): 520
Cold Cranking Amps (CCA): 170
20Hr Nominal Capacity (Ah): 16
Reserve Capacity Minutes: 24
Dimensions L x W x H (in): 7.15 x 3.00 x 6.65
Metric Dimensions L x W x H (mm): 181.5 x 76.3 x 167.8
Weight (lbs): 15.4
Weight (kg): 7
vs
ODYSSEY POWERSAFE DRY CELL BATTERY SBS J-16 ($187.00)
Specifications:
Pulse (5-second) Hot Cranking Amps (PHCA): 680
Cold Cranking Amps (CCA): 300
Nominal Capacity @C1(Ah): 12.3
Nominal Capacity @C/10(Ah): 16
Reserve Capacity Minutes: 25
Dimensions L x W x H (in): 7.15 x 3.01 x 6.61
Metric Dimensions L x W x H (mm): 181.61 x 76.33 x 167.77
Weight (lbs): 15.4
Weight (kg): 6.99
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Charlie
RV-8
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04-05-2017, 10:35 AM
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Join Date: Feb 2006
Location: Panama City Beach, FL
Posts: 129
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I had great luck with the PC-680 when I first started flying my RV-7A in 2010 but I replaced one of the two PC-680s after four years. These new PC-680s have fewer ribs in the sides and the heat under the cowl warp them and then Odyssey will not stand behind their product. I had one a few months ago that lasted two months. My next battery will probably be a different brand.
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Danny - PCB, FL
RV-7A, TMX IOF-360, WW 200RV
GNS480, SL40, GRT EIS/Two HWS, TT
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04-05-2017, 12:54 PM
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Join Date: Dec 2007
Location: Dogwood Airpark (VA42)
Posts: 2,596
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I note that builders seem to have adopted the PC-680 as "the" standard install. On the RV-14 Van's even provides this battery and firewall mount to go with it.
As I previously stated, I view the PC-625 a better battery. It is lighter, more ah and higher CCA than the PC-680 and I find the form factor easier to work with. I note however that I do not mount batteries on the engine side of the firewall. I use two PC-625s to hit my two hour battery reserve design target and to allow for losing one and still continue IFR flight.
For the RV-8, both batteries are mounted on the aft side of the firewall but forward of the gear tower, one on each side. For the RV-10 both batteries go into a modified standard Van's battery mount aft of the baggage compartment. Never did an RV-7 but I'm guessing there are cabin side of the firewall options as well.
Carl
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04-05-2017, 01:15 PM
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Join Date: May 2011
Location: Boynton Beach, FL
Posts: 16
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PC 680
My PC680 is 7 years old in my RV-8.. bought a new one but haven't installed due to calendar age.. still cranking strong.
__________________
2010 RV-8 Purchased Flying
N950AE
IO-375, WW200RV
2020 dues paid
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04-05-2017, 07:21 PM
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Join Date: Oct 2008
Location: Irwin, Pa
Posts: 5
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My flying is simular to yours 30-45 minute flights. I had the first PC 680 for two years before I had enough of it. It seemed to drain quickly even with just the avionics on. My second PC 680 was used with a Battery minder and lasted 4 years. I had to start quick or it dies. When tested it shows 13.1 volts but under a load drops to zero quick. I'm going to talk to people here at Sun n Fun and try something different but not another PC 680.
Thanks
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04-06-2017, 07:55 AM
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Join Date: Feb 2010
Location: Gardnerville Nv.
Posts: 2,828
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So back to this new battery tech issue, some hear I think are in fear of these just popping and exploding into a ball of fire. I like my Earth X. So just a little off topic but related to this new battery stuff......so my 2 stroke gas weed eater gave up on me this last weekend and I gave up on it, so we went to the dark side and got one of these new battery powered ones......40 Volts! WOW! I was shocked and amazed with the performance of this thing. They have come a long way with this Li Ion stuff.
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7A Slider, EFII Angle 360, CS, SJ.
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