My Girlfriends car would not start and the battery was lying.

Last night my Girlfriends car would not start after she got off of work. Since I don't have a phone she could not call me to pick her up so she got a ride home. This morning we went to try and get her car and I took my volt ohm meter to check the battery. It showed 12.5 volts if I remember right. Once I jumped her car off I checked the alternator, and it was putting out over 13.5 volts so I knew the battery was lying and it had to be bad. I also found out why her front turn signal was not working, and it was not a bad bulb. She has a 2001 Buick Century Custom, and in this video I show you how to get to the front bulbs. I also show you why I said that her battery was Lying.