An ultramarathon (ultra distance) or extra long hike may require a decrease in track detail to ensure sufficient battery life, while a normal activity may benefit from greater detail. UltraTrac is a GPS mode that by default decreases the update rate of GPS data to once a minute to provide up to 50 hours of use in ideal conditions.
To maximize battery life and detail on the fenix, tactix or D2:
To maximize battery life and detail on the fenix 2:
Adjusting the settings on your watch will provide you with a good balance between battery life and track detail.
* Setting the update rate to 15 seconds will provide approximately 20 hours of tracking, while setting it the update rate to 20 seconds should provide greater than 24 hours of tracking time. Results will vary based on tracking conditions (heavy tree cover and other things like terrain and buildings can decrease the battery life faster).