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Seems I killed one Odyssey PC625 battery

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Allen Fulmer

Joined: 10 Jan 2006
Posts: 79
Location: Alexander City, AL

Posted: Sat Apr 07, 2012 8:08 am Post subject: Seems I killed one Odyssey PC625 battery

Subaru engine with dual electrical system including pair of Odyssey PC625’s.

 

Left one battery master switch on all night!

6 yr. old PC625 on that master reading only 6.4 volts.

Optimizer battery charger gives error indicating “CHARGER/BATTERY FAULT. Charging stopped”.

Since I was going to replace the batteries anyway before first flight went ahead and bought new PC625.  Charger charges it and remaining 6 year old battery just fine.

 

Would love to have a 12 volt battery sitting on the work bench.

 

So - - - is there any method to bring this battery back to life for bench use only?  

 

Odyssey PC625 AGM battery and Xenotronics Optimizer Model SX100-1.

 

Thanks,

 

Allen Fulmer

RV7 finishing up wiring details before closing top skin.

 

  [quote][b]

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jloram

Joined: 07 Nov 2009
Posts: 54
Location: United States

Posted: Sat Apr 07, 2012 9:56 am Post subject: Seems I killed one Odyssey PC625 battery

You may have well and truly damaged the battery, permanently.  However, it could be that your 'smart charger' is refusing to even try to charge  the battery under the assumption that it  is unrecoverable (typically due  to a shorted cell). Try putting a 'dumb' charger of 1 to 3 amps on the battery  for a couple of hours,  long enough to get the voltage of the batter up  above 10 volts) then replace the dumb charger with the 'smart' charger and see  if the smart charger will recover the battery.

  

 It may be that that the dumb charger will not get the battery  above 8 or 9 volts, confirming that one of the six cells is shorted out in which  case, consider using the battery as a door stop.

  

 cheers, -john-



 [quote]         From:    owner-aeroelectric-list-server(at)matronics.com    [mailto:owner-aeroelectric-list-server(at)matronics.com] On Behalf Of    Allen Fulmer

Sent: Saturday, April 07, 2012 9:12    AM

To: Aeroelectric-List

Subject: Seems    I killed one Odyssey PC625 battery

   

      

    

Subaru engine with    dual electrical system including pair of Odyssey    PC625’s.   

    

Left one battery    master switch on all night!   

6 yr. old PC625 on    that master reading only 6.4 volts.   

Optimizer battery    charger gives error indicating “CHARGER/BATTERY FAULT. Charging    stopped”.



   

Since I was going    to replace the batteries anyway before first flight went ahead and bought new    PC625.  Charger charges it and remaining 6 year old battery just    fine.   

    

Would love to have    a 12 volt battery sitting on the work bench.   

    

So - - - is there    any method to bring this battery back to life for bench use only?        

    

Odyssey PC625 AGM    battery and Xenotronics Optimizer Model SX100-1.   

    

Thanks,   

    

Allen    Fulmer   

RV7 finishing up    wiring details before closing top skin.   

 

 	  Quote: 	
		  



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[b]

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JLuckey(at)pacbell.net
Guest

Posted: Sat Apr 07, 2012 10:07 am Post subject: Seems I killed one Odyssey PC625 battery

You can probably bring it back with diminished capacity – it could be great as a bench-test battery; but you will need an old-school, stupid charger. And you may have to charge & discharge a few times.    

   

Your smart charger has correctly detected that this battery is in trouble, and has refused to charge it.  (Imagine that – Attitude from a battery charger! What’s next? … Grouchy toasters   

   

I’ve been successful reviving a couple of batts with this technique.  But I would NEVER fly with it!  

   

   

         

  

From: owner-aeroelectric-list-server(at)matronics.com [mailto:owner-aeroelectric-list-server(at)matronics.com] On Behalf Of Allen Fulmer

 Sent: Saturday, April 07, 2012 08:12

 To: Aeroelectric-List

 Subject: Seems I killed one Odyssey PC625 battery  

  

   

   

Subaru engine with dual electrical system including pair of Odyssey PC625’s.  

   

Left one battery master switch on all night!  

6 yr. old PC625 on that master reading only 6.4 volts.  

Optimizer battery charger gives error indicating “CHARGER/BATTERY FAULT. Charging stopped”.  

Since I was going to replace the batteries anyway before first flight went ahead and bought new PC625.  Charger charges it and remaining 6 year old battery just fine.  

   

Would love to have a 12 volt battery sitting on the work bench.  

   

So - - - is there any method to bring this battery back to life for bench use only?    

   

Odyssey PC625 AGM battery and Xenotronics Optimizer Model SX100-1.  

   

Thanks,  

   

Allen Fulmer  

RV7 finishing up wiring details before closing top skin.  

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raymondj(at)frontiernet.n
Guest

Posted: Sat Apr 07, 2012 12:27 pm Post subject: Seems I killed one Odyssey PC625 battery

I believe I saw on this list some time back a possible "cheat" for this

situation.  Connect a good battery and the dead battery in parallel with

the charger.  As I understand it the charger is "tricked" into operating

and will then charge both batteries. I have brought dead batteries back

with "dumb" chargers many times, though as others have said, I wouldn't

use them in a critical application.



Hope this helps.



Raymond Julian

Kettle River, MN



"And you know that I could have me a million more friends,

and all I'd have to lose is my point of view." - John Prine



On 04/07/2012 02:04 PM, Jeff Luckey wrote:

 	  Quote: 	
		   You can probably bring it back with diminished capacity – it could be

 great as a bench-test battery; but you will need an old-school,

 stupid charger. And you may have to charge & discharge a few times.



 Your smart charger has correctly detected that this battery is in

 trouble, and has refused to charge it. (Imagine that – Attitude from

  a battery charger! What’s next? … Grouchy toasters 



 I’ve been successful reviving a couple of batts with this technique.

  But I would NEVER fly with it!



 ------------------------------------------------------------------------

*From:*owner-aeroelectric-list-server(at)matronics.com
	


 	  Quote: 	
		   [mailto:owner-aeroelectric-list-server(at)matronics.com] *On Behalf Of

 *Allen Fulmer *Sent:* Saturday, April 07, 2012 08:12 *To:*

 Aeroelectric-List *Subject:* Seems I killed one

 Odyssey PC625 battery



 Subaru engine with dual electrical system including pair of Odyssey

 PC625’s.



 Left one battery master switch on all night!



 6 yr. old PC625 on that master reading only 6.4 volts.



 Optimizer battery charger gives error indicating “CHARGER/BATTERY

 FAULT. Charging stopped”.



 Since I was going to replace the batteries anyway before first flight

 went ahead and bought new PC625. Charger charges it and remaining 6

 year old battery just fine.



 Would love to have a 12 volt battery sitting on the work bench.



 So - - - is there any method to bring this battery back to life for

 bench use only?



 Odyssey PC625 AGM battery and Xenotronics Optimizer Model SX100-1.



 Thanks,



 Allen Fulmer



 RV7 finishing up wiring details before closing top skin.



 *  *



 *  *



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 *http://www.matronics.com/Navigator?AeroElectric-List*



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skywagon

Joined: 11 Feb 2006
Posts: 184

Posted: Sat Apr 07, 2012 3:42 pm Post subject: Seems I killed one Odyssey PC625 battery

..That probably will fool the charger however, I am not so sure about the 

amperage action between the 2 batteries when connected.



I think the fully charged batt. will flash charge the dead batt. with a lot 

of current at least for the several seconds.  Would that be enough to burn 

up the connecting wire or cause the dead one to do something odd or 

dangerous..?



If tried, I would put some type of resistance between the good and dead 

battery so the initial inrush current is limited to some reasonable level, 

maybe 20 amps or less.

Hopefully Bob will inject here and fine tune the idea......

Dave



______________________________________________



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klehman(at)albedo.net
Guest

Posted: Sun Apr 08, 2012 4:07 am Post subject: Seems I killed one Odyssey PC625 battery

I would expect very little current flow and no need for added resistance 

between the two paralleled batteries. In a similar situation my dead 

battery was already high resistance. I could set the charge voltage most 

anywhere and no current would flow into the dead battery. Sometimes if a 

dead battery is held at normal voltage for awhile though it will begin 

to respond and slowly start to accept a charge. I think that is what you 

are trying to achieve. I've never seen significant current flow between 

two paralleled batteries although it is probably possible with multiple 

cells that are truly shorted.



Slightly off topic. I find a power supply with limited current to be 

much more useful than a "bench" battery unless you are trying to spin a 

starter motor or something. The battery tends to smoke things when there 

is a short or a problem with the item under test. I use a homemade 

adjustable current limited power supply but prices are pretty reasonable 

for such things now.



Ken



On 07/04/2012 7:37 PM, David Lloyd wrote:

[quote] 

 <skywagon(at)charter.net>



 ...That probably will fool the charger however, I am not so sure about

 the amperage action between the 2 batteries when connected.



 I think the fully charged batt. will flash charge the dead batt. with a

 lot of current at least for the several seconds. Would that be enough to

 burn up the connecting wire or cause the dead one to do something odd or

 dangerous..?



 If tried, I would put some type of resistance between the good and dead

 battery so the initial inrush current is limited to some reasonable

 level, maybe 20 amps or less.

 Hopefully Bob will inject here and fine tune the idea......

 Dave



 ______________________________________________



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JLuckey(at)pacbell.net
Guest

Posted: Sun Apr 08, 2012 7:13 am Post subject: Seems I killed one Odyssey PC625 battery

Ken makes an interesting point about current-limited power supplies vs

batteries for bench testing.



I have both, and I find that under some conditions the current-limiting can

nuisance trip when used w/ high-inrush loads.



If you are concerned about letting the magic smoke out of some device then

put a fuse in the output of your bench-test battery, you get the best of

both worlds easy & cheap.



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