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 !
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
![Calculating Proper Charge Settings for Rolls Flooded Lead-Acid Batteries : Rolls Battery Technical Support Calculating Proper Charge Settings for Rolls Flooded Lead-Acid Batteries : Rolls Battery Technical Support](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/59925038/original/FmPoxbNSjES04GoMqFfmu01NseQa-977_Q.png?1624988284)