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Optima battery trouble/question

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Old Apr 19, 2009 | 06:01 PM
  #21  
Camaroguy22's Avatar
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If drain my red top down it will never hold a charge again. Not complaining one way or another but that is my experience.
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Old Apr 19, 2009 | 06:33 PM
  #22  
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When I was researching whether or not to get the Optima, I read that it isn't good to leave an AGM battery sitting around to discharge with no use.

They don't do well with it. Makes sense to me since there's less acid in them than a regular battery.

They probably sulfate quicker or something.
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Old Apr 19, 2009 | 07:12 PM
  #23  
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12.6V or higher: 100% charge
12.4V - 12.6V: 75-100%
12.2V - 12.4V: 50-75%
12.0V - 12.2V: 25-50%
11.7V - 12.0V: 0-25%
11.7V or less: 0% (and probably not capable of being recharged).

Shows you how a couple of volts can damage a battery!

Originally Posted by Got uid0
it has to be charged at 2 or 3 amps i think
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Old Apr 19, 2009 | 10:38 PM
  #24  
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redtop needs to be charged slowly, for sure!
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Old Apr 19, 2009 | 10:48 PM
  #25  
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Originally Posted by nextime
12.6V or higher: 100% charge
12.4V - 12.6V: 75-100%
12.2V - 12.4V: 50-75%
12.0V - 12.2V: 25-50%
11.7V - 12.0V: 0-25%
11.7V or less: 0% (and probably not capable of being recharged).

Shows you how a couple of volts can damage a battery!
If I recall correctly, when I talked to Optima Tech Dept they said they consider the battery totally dead at 10.5 volts, not 11.7 or less.

But technically, it depends on the discharge rate (C/xx number). See PDF link and charts in the tech info:
http://www.arttec.net/Solar_Mower/4_...20Charging.pdf

Other info:
http://xtronics.com/reference/batterap.htm

http://www.rollsbattery.com/content/...wind?q=node/51

Last edited by ZeeOSix; Apr 19, 2009 at 10:57 PM.
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Old Apr 20, 2009 | 12:22 AM
  #26  
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This is excellent info. It is not exactly for starting batteries but does cover them very well. It will help those with RVs a bunch also. Later! Frank

www.ccis.com/home/mnemeth/12volt/12volt.htm
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