ANYBODY USE A 12V SOLAR BATTERY CHARGER OBD2 connector I KNOW ALL NEW VW'S COME WITH A SOLAR BATTERY TRICKLE CHARGER WITH A OBD2 connector. THESE ARE GREAT FOR A SLOW BATTERY CHARGE WHEN THE PRIUS IS PARKED FOR SOME TIME, SO BATTERY WONT DIE... Has anybody used one of these chargers?