My car dies over night but runs all day when I jump it
2 Answers
Take it in and get the charging system checked, most auto parts shops often do this as a free service. If it passes, you may have a parasitic drain on the battery over night, if you have a mater you can check for that; http://www.wikihow.com/Find-a-Parasitic-Battery-Drain
I had same problem with a 3-year old battery. It was found to be weak by my mechanic. A new battery solved the problem. No problems for a year since the battery was replaced.
