Had the same problem, replaced the battery and the problem went away for a while, and now it's returned. I held on to the old battery and I noticed it was still in good shape (reading 12.6 volts) constantly. I have another vehicle that uses the same type of battery so I put the old Dart battery in it and the old Dart battery has been working like a champ. It's not the battery. When I contacted the dealer, the service guy acknowledged they've had several cars in with this same problem but when he found out that the car is few months out of warranty, they changed their tune and acted like they've never heard of it. This tells me it's a big problem and Chrysler/Fiat do not want to acknowledge it to the public or doesn't want their dealers to make it known to their customers. Do not just buy a new battery, find out the cause of the problem. I think it's ECM related from what dealer service manager hinted.