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12-10-2019, 02:17 PM | #1 |
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Join Date: Dec 2015
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Optima 6V battery charge
On a 6V optima redtop battery, what should the testing voltage be on a 100% charged battery?
JB |
12-10-2019, 02:24 PM | #2 |
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Join Date: Oct 2018
Location: The Thumb of Michigan
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Re: Optima 6V battery charge
6.3 volts. 2.1 per cell.
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12-10-2019, 02:54 PM | #3 |
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Location: Arkansas
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Re: Optima 6V battery charge
6.3 here also.
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12-10-2019, 03:15 PM | #4 |
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Join Date: Dec 2015
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Re: Optima 6V battery charge
My charger shot it up to about 7.0v and still showed charging not complete.
JB |
12-10-2019, 03:49 PM | #5 |
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Location: Bonita, CA
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Re: Optima 6V battery charge
That sounds fine. Right after charging the voltage will be higher. After charging, let it sit for a few hours, then take a reading. Use a quality fully automatic charger not a cheap one with constant amps.
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01-05-2020, 09:42 PM | #6 |
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Re: Optima 6V battery charge
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JB |
01-05-2020, 09:52 PM | #7 |
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Re: Optima 6V battery charge
What type of charger do you use? Dave/Green Bay
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01-05-2020, 09:55 PM | #8 |
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Join Date: Dec 2015
Posts: 547
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Re: Optima 6V battery charge
It’s a schumacher 6v charger/maintainer.
JB |
01-06-2020, 02:01 PM | #9 |
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Join Date: Jun 2014
Location: Williamsburg, VA
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Re: Optima 6V battery charge
Most of these smart chargers are too smart for their own good. Like if a battery gets completely discharged, they will indicate failed battery and not even try to start charging. I use an ancient Western Auto trickle charger to get the things started, and then hook up the smart one.
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01-06-2020, 05:41 PM | #10 |
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Join Date: Oct 2018
Location: The Thumb of Michigan
Posts: 107
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Re: Optima 6V battery charge
Very good point about the "smart" chargers. I've had the same experience.
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01-07-2020, 11:55 AM | #11 |
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Location: Daytona Beach, Fl & Spencer, W. Va,
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Re: Optima 6V battery charge
I've had the best luck NOT keeping these batteries on the trickle charger (Battery Tender) 100% of the time. I'll put the charger on for a day or so once every month or so, but leave it at that. I think leaving AGM batteries such as the Optima on chargers 24/7 is bad for them.
I have a 12V Optima in the mustang that still works great... and is dated 02/06 Good Luck
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01-07-2020, 12:43 PM | #12 |
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Re: Optima 6V battery charge
I have used a "Battery-Tender" on several of my batter's, for many years, including AGM and/or Optama's, never had what I would call a failure. I did have a problem if I left the 'Tender' disconnected to long.
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01-07-2020, 04:03 PM | #13 |
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Location: Iowa
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Re: Optima 6V battery charge
We use the Battery Tender all winter. It keeps our Optima batteries ready for the next drive. Most of our Optimas last years with no problems. Glass Mat batteries require low charging rates to prevent damage.
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01-07-2020, 05:06 PM | #14 |
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Join Date: Nov 2012
Location: Wichita KS
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Re: Optima 6V battery charge
Battery charge table:
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01-09-2020, 01:10 PM | #15 |
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Location: upstate NY
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Re: Optima 6V battery charge
I have had good results with this one
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01-10-2020, 06:10 AM | #16 |
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Join Date: Dec 2015
Posts: 547
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Re: Optima 6V battery charge
I am going to return the battery I think. I can’t get the battery to hold a charge. It dropped from 6.36 volts to 6.0 volts overnight. I think it has a bad cell.
JB |
01-11-2020, 04:33 PM | #17 |
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Location: Columbia, SC
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Re: Optima 6V battery charge
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