Lawrence Glickman wrote:
>
> A fully charged battery is 12.9 volts.

Nominal battery voltage is 12.6 volts, i.e. neither charging nor discharging.

> Anything under 10.4 volts is considered *weak*
> but 10.4 volts or better is normal when you put a starter load on the
> battery. When you take the load off, it will return immediately to 12
> point something.

10 volts might be weak, but I have seen many engines start with 8 volts.

--
Mike Walsh
West Palm Beach, Florida, U.S.A.