I'm reading that a good fully charged battery should be at 12.3 V resting. My battery has been sitting on a smart charger and maintainer and says 12V only and the charger
what car battery voltage is too low Anything below 12 volts is flat & 12 volts is about 50% charged,12.4 volts is 75% charged & 12.6+ volts is 100% charged !
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Calculating Proper Charge Settings for Rolls Flooded Lead-Acid Batteries : Rolls Battery Technical Support
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