I came back from 3 weeks vacation and cannot start my 1 year old 2010 Prius. No lightes on nothing working... Fob is with me and I cannot open rear door. Car was not locked in the garage during 3 weeks. I have no idea if it's a 12v battery or my remote battery... I even do not know how to jump-up my Prius if battery low... I try as usually to press the pedal and to press the button... nothing happens... Surprise... Do you have any suggestions?