I have a brand-new grand Banks currently being commissioned- it has
8D AGM batteries. The starting battery has been slowly discharging -
it has been at 11.9 V for the past 10 days and is now down to 11.8. I
have tried to alert the yard to this problem and they say they will
get around to fixing it (they say it's the charger- although the
house batteries are at 13.5 or so over that same period of time and
are being used). So I am concerned that the starting battery has been
permanently damaged. I would appreciate any opinions about this and
ideas about how I might test for this possibility. I'm assuming that
the yard will put a charger on it eventually and, while connected,
will show normal voltage.
I would appreciate your thoughts on this.

Bob wrote in news:ddf567aa-f148-4870-8e36-
:

So I am concerned that the starting battery has been
permanently damaged

You would be correct. That battery is permanently sulfated. It's lead
sulfate ions have long since turned to crystals, never to return.

Just replace it and try not to cry.

The real way to make this determination is to use a computer based battery
tester. Most everything else is at best a guess.

Don Dando


"Bob" wrote in message
...
I have a brand-new grand Banks currently being commissioned- it has
8D AGM batteries. The starting battery has been slowly discharging -
it has been at 11.9 V for the past 10 days and is now down to 11.8. I
have tried to alert the yard to this problem and they say they will
get around to fixing it (they say it's the charger- although the
house batteries are at 13.5 or so over that same period of time and
are being used). So I am concerned that the starting battery has been
permanently damaged. I would appreciate any opinions about this and
ideas about how I might test for this possibility. I'm assuming that
the yard will put a charger on it eventually and, while connected,
will show normal voltage.
I would appreciate your thoughts on this.