Doesn't have to drop in voltage -it can go up too,which I think mine is doing now.
If the alternator doesn't go out or you haven't had it tested by I'll bring my simple voltage tester on Saturday.
Used to see around 14-14.5 on the guage, but lately has been closer to the next line up. Started last Wednesday and I've had the battery freeze up twice since then -Friday and this morning.
Was almost late for work -had to take my sister'* GP and she took my mom'* Park Ultra to work since the GP was parked behind the Park and I had to leave -like yesterday. Luckily no one was parked in front of my car which was just off the side of the driveway. Had there been someone parked there they'd have been stuck until my brother took the battery out and brought it in, thawed it, and trickle charged it (Thanks Tom). Was all ready to go when I got back home.
Gonna go and grab the wheels and alternator off the parts car tomorrow.