Something has got to be off. We picked our '11 up during Thanksgiving last year. It's a "trip only" car...nothing but long trips. So it sits (unlocked) for months at a time in the garage. Never had a hard time starting it at all. Never even thought to hook it to a battery charger. Our mileage is around 3,400...all long trips (OC to Palm Springs, San Diego, Central CA, etc.).