Yea, I wanted to average 7:30. I usually keep track of my pace with my Garmin watch. I charged it up the night before, and at 5am right before I left for the race, I switched on the watch and it beeped low battery! I ran with my old Timex, but I did the math wrong in my head. By the time I realized that I was behind, I wasn't able to make up the time.
The Garmin watch charges fine with the wall plug, but I charged it on a USB port on my computer. There are reports of the watch draining the battery if charged via a computer. Lesson learned.