Although my only symptoms so far are:
-clock resets to zero and radio presets get erased every couple weeks
-sitting in the car with instruments active for a while and battery warning comes on.
I suspect if we did bigger trips with our 2007 4.8i we would have something like this happen.

At times when running the engine I have Measured the terminals of the battery at 14.8

How could the clock reset but we can still have enough juice to start the car. Perhaps an ultra-gauge is needed for the extra feedback on voltage per short trip in the car.