Optima battery trouble/question
Apr 19, 2009 | 06:01 PM
Instructor
Joined: Jun 2006
Posts: 241
Likes: 0
From: Gambrills Maryland
If drain my red top down it will never hold a charge again. Not complaining one way or another but that is my experience.
Apr 19, 2009 | 06:33 PM
Racer
Joined: Jul 2007
Posts: 422
Likes: 0
From: Greenwood Village Colorado
St. Jude Donor '08
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.
Apr 19, 2009 | 07:12 PM
Drifting
Joined: Jul 2006
Posts: 1,564
Likes: 4
From: Brookfield Wisconsin
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!
Quote:
Originally Posted by
Got uid0
it has to be charged at 2 or 3 amps i think
Apr 19, 2009 | 10:38 PM
Pro
Joined: Apr 2006
Posts: 552
Likes: 0
From: Alton Illinois
redtop needs to be charged slowly, for sure!
Apr 19, 2009 | 10:48 PM
Le Mans Master
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
Quote:
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 .
Apr 20, 2009 | 12:22 AM
Pro
Joined: Oct 2007
Posts: 679
Likes: 4
From: TremontonUT UT
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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