I learned two things this morning, when I went for a run at 5:45, instead of my usual 6:45 start time.
1. When the streetlights are off at 5:45, you can't see anything, because it is still 100% dark. It isn't like when it is starting to get light at 6:45, and the areas without streetlights are only a tiny bit darker than the lit areas.
2. 13% batter life on the Garmin is good for about 3.75 miles. Not 4 miles. Notes for next time: charge your watch more often!