The other day my car would not start but my lights still turned on. A couple hours later my car was completely dead, so i charged my battery and my alarm was going off so i knew it was the battery. Later on that night my car was running and then my headlight went out. The next morning my car didn't start so i bought a new battery. My car was running fine until the next day it would not start. My dad looked at it and said the clamp was loose on the battery and then it started fine. Well the next day it didn't start at all. Do you think it is the alternator or something else? Thanks so much!