I bought my 2003 Viper in March 2013. The day after I brought the car home, the batter was dead so I bought a brand new one in April from my local Advanced Auto Parts. I put the car away for the winter in late October and took it out once more in November when we had a rare 60+ degree day in November. Yesterday I went to start the car to let it run and the battery was dead. My father owns a Shelby GT500 that he hasn't started since October and it started right up. Do you think I have a faulty battery or is this common for our Vipers?