I charged a 61Ah battery from 11.8V to 12.7V in a day, another day in the recharging mode (with the FULL indicator on) the voltage on the battery rose to 13.1V. If you plan to charge ordinary car batteries (not AGM type), I don’t see the point in overpaying for older C3, C7 models.
I hope the pictures I included give a clearer picture of my experience.
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