This. It seems like most people don't realize how much power GPS requires, especially for it to be on 24/7. Even advanced sport watches (e.g., Garmin's Forerunn

This. It seems like most people don't realize how much power GPS requires, especially for it to be on 24/7. Even advanced sport watches (e.g., Garmin's Forerunner 620) don't last half a day with it on.