I will be leaving my x at the airport in Atlanta for 8 days. When I get back I will have a 200+ drive to get back home. I am trying to make it home as fast as possible so i am trying to determine how much is maximum charge that I can safely leave it at for that time period. Can I leave it parked at 90% for 8 days without putting too much strain on the battery? I expect 1-3% battery loss per day.