Flash, it should put out closer to 14 volts or a little over to force a charge back into the battery. A fully charged battery should put out close to 12.8 volts. At 12 volts it's really pretty discharged. They call them 12 volt batteries but they put out more. A 1.5 volt flashlight battery really put's out around 1.6 volts when new.
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Hank
70 Chevelle SS396(454), M20, 3.73
My Chevelle
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