I borrowed my husband's 2008 Dodge Caliber to help my grandmother move a trunk. There was a crazy driver who almost hit me and I swerved to avoid an accident but the corner of the trunk caught the back windshield and shattered it. We got a repairman to come out later that day who replaced the rear windshield. I thought everything was fine. Later in the week, we went out to get groceries and his battery was dead. I took it to AutoZone to see if it could be charged. And it could! Later that week same problem. I took it to AutoZone and They tried to charge it and said It wouldn't charge. So I bought a new battery. Again it lasted a week. I was wondering if replacing the back windshield may be something that was wired wrong and keeping a light on even though it's not hooked up or something like that. I know now we don't have the back windshield wiper that use to be on the car (didn't notice as we never used it) Trying to get an idea of what is wrong so I know what to look for or seek help from a mechanic.