I have a 2009 XC90 that I bought brand new from the factory. When it was 7 months old the battery was dead after returning from a 4 day vacation. We had it jumped then looked at by Volvo mechanics and they could not find anything wrong with it. Over the course of the last two years the battery has died and replaced at least an additional 4-5 times. We had Volvo run tests on it but they can't find out what is wrong with it. Some of the explanations by the technicians are "the factory installed the wrong battery" or "the battery was defected." This is very frustrating since it's cost us much money out of pocket for towing and taxis and missed work and vacations. We just picked up the car today for another dead battery after having it looked at by another Volvo technician and they, too, could not find out anything wrong with it. Battery charged, alternator checks, no error codes. This is an ongoing dilemna every 3 to 4 months. What can I do? Help!!!