Hey, all! This question is for a non-Disney (*gasp*) race, but I'm hoping you'll find it in your heart to answer anyway! I will be running my first full marathon in December and I'm guessing it'll take me right in the six-hour ballpark to finish. I use the runkeeper app on my iphone 4 and I am realizing there is no way the battery is going to last that long! What are some good options? What would extend my battery life? Some battery extender?Or is there a Garmin watch recommended? I like having my music when I'm running but I'm sure if I am using my phone as a music player and not using the GPSt tracking app the battery will last the whole time. A GPS watch would certainly be nice, and I guess my requirements for that would be that the battery would last longer than six hours, and that it displays current pace, average pace, overall distance and overall time. What are some recommendations? Thanks!