Dead battery

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Leesommer
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Dead battery

Post by Leesommer »

Stupid me.... did a real rookie move and left my master on.... On for about 2 weeks. Battery stone dead... If I take it out and charge ..... What are my odds of bringing it back... only 1 year old.

Thoughts? :scream:
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Rich
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Re: Dead battery

Post by Rich »

I can only say that my Concorde RG24-15M got beat up pretty badly when I had a Slick Start problem a few years ago, which triggered the 25-amp essential bus breaker problem several times. My (super-special for this type battery) BatteryMinder recovered it. Yours needs de-sulfation and it needs to be done properly, which this BatteryMinder will try to do. It's worth a try.
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Rich
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Re: Dead battery

Post by Rich »

I have an alarm of sorts if the master is still on as I'm closing up - my attitude indicator makes this truly obnoxious high-pitched whine when its running :scream:
2002 DA40-180: MT, PowerFlow, 530W/430W, KAP140, ext. baggage, 1090 ES out, 2646 MTOW, 40gal., Surefly, Flightstream 210, Orion 600 LED, XeVision, Aspen E5
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Charles K
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Re: Dead battery

Post by Charles K »

The screens are both lit up - hard to miss :)
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Lou
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Re: Dead battery

Post by Lou »

Did your Hobbs advance a bunch? Mine did when I did the same thing last year. My battery was 5 or 6 years old so I opted to replace.
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perossichi
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Re: Dead battery

Post by perossichi »

I’ve done same thing. Battery minder brought battery back from about 15v which is pretty discharged. Same battery as Rich. Using same battery for two years since and it is fine.
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Steve
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Re: Dead battery

Post by Steve »

If the open circuit voltage on your battery is <=20 volts (I suspect it is), you will have to perform the Deep Discharge Recovery Procedure specified in the Concorde Battery Component Maintenance Manual (I assume yours is a Concorde), page 108, then do a Capacity Test on it to make sure it is airworthy:

5-0171.pdf
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Leesommer
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Re: Dead battery

Post by Leesommer »

Steve, You are correct... It was 2 volts and did the recommended for lead acid Gill. I will see if it is back this morning.
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ultraturtle
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Re: Dead battery

Post by ultraturtle »

Charles K wrote: Fri Jun 19, 2020 12:27 am The screens are both lit up - hard to miss :)
Not too hard, actually. I "heard of a guy who" left the master on and ran the battery down - at Oshkosh, no less. Didn't even notice the screens while "he" put the canopy cover on.

I just did some training with Tim McConnell, the best CFII I ever saw, and he clued me in on a technique that I will be using from now on. Never turn the position light switch off. Impossible to miss in a hangar, and even if you do not notice the lights on as you walk away from the plane on the ramp, your FBO will probably call you on your drive home to let you know you left them on.
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Chris B
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Re: Dead battery

Post by Chris B »

ultraturtle wrote: Sun Jun 21, 2020 12:48 pmI "heard of a guy who" left the master on and ran the battery down - at Oshkosh, no less. Didn't even notice the screens while "he" put the canopy cover on.
Amazing. I know the same guy! :oops:

Never turn the position light switch off. Impossible to miss in a hangar, and even if you do not notice the lights on as you walk away from the plane on the ramp, your FBO will probably call you on your drive home to let you know you left them on.
One of the many benefits of LED position/strobe lights is that the current drain is so low that we always leave these on. Except strobes for courtesy on the ramp at night, or reports of a nut job with a laser.

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