My car decided not to start at one point yesterday so I took it to AutoZone today to get the battery checked out. I didn't have to wait, he came right out and tested it, told me I had a bad battery, and got me all set up with a new one. Even installed it and got rid of the old one. When he was installing it I asked it he could check my alternator. He did, said it was really good so it was definitely my battery. Unfortunately it was an unexpected expense that I didn't really need right now, but lucky that it was painless and quick.