I have a 2002 Ford Focus and every time we have cold weather my car battery will be dead in the mornings. After I jump the car I can drive it and it will be fine the rest of the day but the next morning the battery is dead again. I seem to have this problem every winter and I end up buying a new battery every time only to have it die the next year.
I've wondered about the starter motor but never had it checked. I also wondered if there was a drain on my battery but I've checked it with a voltage meter on several occasions and there doesn't seem to be one.