Quote:
Originally Posted by Kmikesell
It might have read a little lower..... But why would that reading be impossible?
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12V batteries at rest can only hold 12.9V (for a short time) in a brand new, high quality battery. It has to do with the maximum specific gravity of the battery acid. 13.0V plus indicates some sort of voltage input. 13.5V is actually a charging voltage to get the battery up to 12.9V.