While I might not be a mechanic by any stretch of the description, I am also not a complete idiot. I work on my own cars, and have since forever, because I cannot afford to have a mechanic do it for me. That being said, the battery WAS reading 15+ volts approx. 30 minutes after shutting the car off but still wouldn't start the car. Now here I am a day and a half later and the battery just tested at 12.13 volts. I attempted to start the car, no go. Checked the battery again and it still read 12.13 volts. Tried starting the car again, still no go, and checked the battery AGAIN and it read 11.86 volts. Battery terminals are clean as well as all the connections to the alternator and the ground connections from battery and starter.