It was 7:30 and the convention had finished.  The girls were going to stay back and play games with friends and my neice was good enough to set the car maps up for me to get back to the hotel.  I knew my phone battery was very low but she thought there was plenty of battery to get me there. 2 minutes into the drive, my phone died.  I had no navigation back to the hotel, and our hotel was at least 7 miles from the convention center. I had gone a different way than the other days to drop…