...less than 50% of its capacity, or 12.2V. But if 12.2V is 50%, then 0% must be about 11.8.
So again, I wonder what the difference is between 'exhausted', 'dead', 'discharged', and '0% capacity'. And if I leave my dome light on for a week, should I expect my battery to drain to 11.8V or to...