 Optima Battery Failure Characteristics, Engine Turns over slower and slower |
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| Spoke |
 Jan 21 2008, 11:01 AM
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Jerry  Group: Members Posts: 6,994 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None 
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I have a red top Optima battery in my 74 and over the last few months, the engine has been turning over slower and slower. What are the characteristics of the Optima when it is going bad?
Lead acid batteries usually just dump and won't start the car. I haven't checked the voltage at rest or while the engine is running to see if it's the battery or my charging system. I guess that will be tonight's activity. Can I use an external charger to try to put a full charge on the battery? Thanks, Spoke |
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| Dr. Roger |
Jan 27 2008, 04:57 AM
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A bat out of hell. Group: Members Posts: 3,944 Joined: 31-January 05 From: Hercules, California Member No.: 3,533 Region Association: Northern California |
Optima's website also said not fully charging their batteries to a full 15V will shorten the life of their batteries.
MOST lead acid smart charger" battery chargers cut off at around 14.5V... additionally..... (taken from the optima red top pages regarding charging red tops....) Recharge Time: (example assuming 100% discharge – 10.5 volts) Current Approx. time to 90% charge 100 amps 35 minutes 50 amps 75 minutes 25 amps 140 minutes Recharge time will vary according to temperature and charger characteristics. When using Constant Voltage chargers, amperage will taper down as the battery becomes recharged. When amperage drops below 1 amp, the battery will be close to a full state charge. (All charge recommendations assume an average room temperature of 77°F, 25°C) **************** Not fully charging a battery can result in poor performance and a reduction in capacity. **************** I also learned a few things on car batteries here http://www.gammatron.com.au/datasheets/appnote.pdf |
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Posts in this topic
Spoke Optima Battery Failure Characteristics Jan 21 2008, 11:01 AM
Rusty Yes, you can use a 2 amp trickle charger on an Opt... Jan 21 2008, 11:10 AM Dr. Roger I'm sure you've cleaned the battery termin... Jan 21 2008, 12:31 PM ConeDodger I had an odd problem. My silver car was overchargi... Jan 21 2008, 12:38 PM Rusty A load test is a good idea. I'd charge it up,... Jan 21 2008, 12:58 PM jim_hoyland I have read that the red tops require a different ... Jan 21 2008, 05:16 PM Andyrew I had my red top die, charged it up with my normal... Jan 21 2008, 07:59 PM
banger You just have to be careful about overcharging a s... Jan 21 2008, 08:31 PM Spoke I have an SC34U Red Top Optima.
From Batteries Ar... Jan 22 2008, 09:06 PM Spoke I measured the resting battery voltage to be 12.28... Jan 22 2008, 11:42 PM banger With a resting voltage of 12.28v, this indicates r... Jan 23 2008, 01:28 AM banger Also forgot to mention that with the charger on, i... Jan 23 2008, 01:30 AM banger Here is a quote from battery university regarding ... Jan 23 2008, 01:39 AM Spoke Did some measurements today with the engine runnin... Jan 26 2008, 11:54 AM banger I believe that 13.8 is usually wht most regulators... Jan 26 2008, 08:20 PM tommy914 This is the info from theOptima Battery web site... Jan 26 2008, 09:56 PM orthobiz When I bought my fan-inflated storage bubble, I bo... Jan 27 2008, 11:45 AM Chevota79 I have had red tops in my four wheel drive and hav... Jan 27 2008, 11:51 AM SGB So I thought my charger was messed up since it cyc... Jan 27 2008, 11:59 AM |
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