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PC 680

 
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edwclg



Joined: 30 Dec 2007
Posts: 14

PostPosted: Mon Mar 12, 2018 9:03 am    Post subject: PC 680 Reply with quote

I have a PC 680 battery in my RV 8 and am wondering how long on average will one last.
Mine has been installed for almost 6 years.
Thanks

Ed Clegg


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althomas454(at)msn.com
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PostPosted: Mon Mar 12, 2018 9:57 am    Post subject: PC 680 Reply with quote

I am on my fourth PC 680 in 6 years. My current primary is 1 year old and the secondary is 2 years old. I’m amazed yours still holds a charge.

Sent from my iPhone

Quote:
On Mar 12, 2018, at 11:03 AM, edwclg <edwclg(at)gmail.com> wrote:



I have a PC 680 battery in my RV 8 and am wondering how long on average will one last.
Mine has been installed for almost 6 years.
Thanks

Ed Clegg




Read this topic online here:

https://nam03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fforums.matronics.com%2Fviewtopic.php%3Fp%3D478620%23478620&data=02%7C01%7C%7C866f29c0a0704459e5c408d5883c16af%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636564714013838509&sdata=yohPs82xgSx8TPPop7zCauvBRGIGVEQIuONICht30H4%3D&reserved=0











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carl.froehlich(at)verizon
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PostPosted: Mon Mar 12, 2018 10:24 am    Post subject: PC 680 Reply with quote

I run two PC-625s (two are needed to hit my IFR electrical power reserve target). Both are used for engine start and in normal mode run in parallel. I replace one battery every three years - so no battery is older than six years. I started out replacing one every two years but found they still had a lot of life left in them. The pulled batteries go on to a second life in various tractors.

Note - I once killed a new battery by leaving the master on. While some say you can beat new life into abused Odyssey batteries, it is better to replace the battery and then experiment on the dead one for service in a tractor.

Carl

--


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craigtxtx(at)yahoo.com
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PostPosted: Mon Mar 12, 2018 11:09 am    Post subject: PC 680 Reply with quote

I change mine out every three years as a precautionary measure. So far no battery failures. That may be overkill, but it affords me some peace of mind and I’m willing to pay for that.

Craig Gallenbach
RV8A N184CG 600hrs since 2008

Quote:
On Mar 12, 2018, at 1:56 PM, ALBERT THOMAS <althomas454(at)msn.com> wrote:



I am on my fourth PC 680 in 6 years. My current primary is 1 year old and the secondary is 2 years old. I’m amazed yours still holds a charge.

Sent from my iPhone

> On Mar 12, 2018, at 11:03 AM, edwclg <edwclg(at)gmail.com> wrote:
>
>
>
> I have a PC 680 battery in my RV 8 and am wondering how long on average will one last.
> Mine has been installed for almost 6 years.
> Thanks
>
> Ed Clegg
>
>
>
>
> Read this topic online here:
>
> https://nam03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fforums.matronics.com%2Fviewtopic.php%3Fp%3D478620%23478620&data=02%7C01%7C%7C866f29c0a0704459e5c408d5883c16af%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636564714013838509&sdata=yohPs82xgSx8TPPop7zCauvBRGIGVEQIuONICht30H4%3D&reserved=0
>
>
>
>
>
>
>
>
>






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ceengland7(at)gmail.com
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PostPosted: Mon Mar 12, 2018 11:10 am    Post subject: PC 680 Reply with quote

There's a pretty big sample size on the VAF rv site. The guys who have short lived pc680s are usually the ones using 'maintainers' regularly. AGM batteries last a long time if not needlessly cycled by leaving a maintainer on them. I ran a cheap pc625 equivalent in my rv4 for about 6 years, and it still had around 65% of its capacity left.
It does pay to check capacity at annual, especially if you're electrically dependent. Being able to crank the engine isn't a good indicator of capacity.
Charlie
On Mar 12, 2018, at 12:07 PM, edwclg <edwclg(at)gmail.com (edwclg(at)gmail.com)> wrote:
Quote:
Quote:
--> RV8-List message posted by: "edwclg" <edwclg(at)gmail.com>I have a PC 680 battery in my RV 8 and am wondering how long on average will one last.Mine has been installed for almost 6 years.ThanksEd CleggRead this topic online here:http://forums.matronics.com/viewtopic.php?p=478620#478620.com/Navigator?RV8-List">http://www.matronics.com/Navigator?RV8-List< --> http://forums.matro--> http://wiki.matronics.matronics.com/contribution">http://www.matronics.com/contribution


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Rice737(at)msn.com
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PostPosted: Mon Mar 12, 2018 12:49 pm    Post subject: PC 680 Reply with quote

I end up replacing my 680 every 2 years. At about the one and half year mark, in the winter they get weak and have trouble turning the cold engine, especially after sitting 2 to 3 weeks. My battery is in the rear if the plane, that may make a difference compared to engine compartment installs. Been that way for the 10 years or so Ive been flying the airplane.

Paul Rice
RV8 2007

________________________________________
From: owner-rv8-list-server(at)matronics.com <owner-rv8-list-server(at)matronics.com> on behalf of Carl Froehlich <carl.froehlich(at)verizon.net>
Sent: Monday, March 12, 2018 2:24:24 PM
To: rv8-list(at)matronics.com
Subject: RE: PC 680



I run two PC-625s (two are needed to hit my IFR electrical power reserve target). Both are used for engine start and in normal mode run in parallel. I replace one battery every three years - so no battery is older than six years. I started out replacing one every two years but found they still had a lot of life left in them. The pulled batteries go on to a second life in various tractors.

Note - I once killed a new battery by leaving the master on. While some say you can beat new life into abused Odyssey batteries, it is better to replace the battery and then experiment on the dead one for service in a tractor.

Carl

--


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edwclg



Joined: 30 Dec 2007
Posts: 14

PostPosted: Mon Mar 12, 2018 12:51 pm    Post subject: PC 680 Reply with quote

I have never had a problem starting even after leaving it for a month. Also, have never used a maintainer on it.However I did order another figuring 6 years is long enough.
This is a good discussion. Nice to have all this feed back.
Ed clegg
On Mon, Mar 12, 2018 at 3:10 PM, Charlie England <ceengland7(at)gmail.com (ceengland7(at)gmail.com)> wrote:
Quote:
There's a pretty big sample size on the VAF rv site. The guys who have short lived pc680s are usually the ones using 'maintainers' regularly. AGM batteries last a long time if not needlessly cycled by leaving a maintainer on them. I ran a cheap pc625 equivalent in my rv4 for about 6 years, and it still had around 65% of its capacity left.
It does pay to check capacity at annual, especially if you're electrically dependent. Being able to crank the engine isn't a good indicator of capacity.
Charlie
On Mar 12, 2018, at 12:07 PM, edwclg <edwclg(at)gmail.com (edwclg(at)gmail.com)> wrote:
Quote:
Quote:
--> RV8-List message posted by: "edwclg" <edwclg(at)gmail.com (edwclg(at)gmail.com)>I have a PC 680 battery in my RV 8 and am wondering how long on average will one last.Mine has been installed for almost 6 years.ThanksEd CleggRead this topic online here:http://forums.matronics.com/viewtopic.php?p=478620#478620.com/Navigator?RV8-List">http://www.matronics.com/Navigator?RV8-List< --> http://forums.matro--> http://wiki.matronics.matronics.com/contribution">http://www.matronics.com/contribution




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bigginsking



Joined: 25 Sep 2012
Posts: 23
Location: San Diego, California

PostPosted: Tue Mar 13, 2018 7:47 am    Post subject: PC 680 Reply with quote

I think that there are two things that prematurely kill the Odssey batteries:
1. not charging at high enough of a voltage
2. Slow drains while sitting
I've got my voltage regulated at 14.4 volts and when the battery disconnects the only parasitic load is the Dynon keep alive.
I've got two PC625s, one for cranking, one for backup. I do the same as a lot of guys, add a new one to the emergency position every 2 years(thinking about three) and make the old emergency one the new cranking battery.
Batteries are substantially more reliable if you avoid cranking on them. 
I took year off work to travel and the plane sat for 9 months with a 2 year old battery, I came back and it started right up with no charging.
Bill Judge
RV-8 N84WJ
1360 hrs
http://rv-8.blogspot.com/


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speedy11



Joined: 29 Jun 2015
Posts: 38
Location: Port Orange, FL

PostPosted: Tue Mar 13, 2018 6:00 pm    Post subject: PC 680 Reply with quote

Ed,
I agree - a very good discussion.
I concur with all of the comments. I started out replacing 1 battery (two on board) every two years. Cap checks showed the old battery to still be very capable - can't remember the exact numbers - I had the guys in my FBO check it for me. I changed to 4 year swapout and I have had virtually no issues even with occasional long sit times.
However, I am replacing the entire panel - EFIS, txpndr, radios, AP - and the batteries have been sitting unused and uncharged for 6 months. So, as part of the overall upgrade, I decided to install EarthX LiFePo4 batteries. I'm having to make new battery mounts since the EarthX have slightly different dimensions. It is always something, isn't it? I'll send an update later in the year when I have some experience with the new batteries. One thing is for sure, they are much lighter than the PC680s.
Stan Sutterfield
RV-8A


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