Get the new battery, drive it home. Shut the car off. Restart it to make sure the battery has a good charge. Shut the car off. Disconnect the - terminal. When you get ready to go to work in the a.m., reconnect the - connection. If it starts fine, the problem's in your car. If it doesn't, O'Reilly might supplies batteries made in China. If it does start.......then what these guys are saying! lol.