Okay so my car starting to shake as I was driving on the interstate, then I notice my speedometer wasn't working and my radio cut off. I replace the battery, the car worked for an hour and did the same thing mentioned above. I took the battery to get charged and they said the battery was no good. The battery light in the dashboard had been blinking and I was told most likely it's the alternator. I went and brought a brand new alternator and brand new battery it was put in and my car started running fine for a few hours, then it did the same that again. I took the newest battery out to get it charged and they told me that battery was bad as well. Does anyone know what else can be killing my battery other than the alternator? Thanks for reading! By the way it's a 2002 audi tt with 91,000 miles on it of that helps any.