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Thread: Optima Battery losing fluid

  1. 09-16-2012, 08:01 PM #1
    red911
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    Optima Battery losing fluid

    Hello all,

    I have a yellow top Optima battery in my '67 911 with a 55 amp Bosch alternator, and there is fluid in the battery box area. The terminals were 168 degrees F after the drive, but the battery had a 12.65 V charge.

    Then, today, I drove my '88 911 Targa with a red top battery, and the battery was hissing after a 200 mile trip. Standard alternator in the '88. The battery had a 13.65 V charge. The car would not start after ten minutes.

    Optima's website says it can take a 15 V charge.

    Has anyone else experienced this, as it cannot be good for the battery.

    Thanks, Tom
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  2. 09-16-2012, 08:08 PM #2
    edmayo
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    What is the charging rate of both cars measured at the battery at 2,000 RPM? Sure sounds like its overcharging.
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