The fenix is indeed compatible with Garmin Connect. Here's a duplicate of my post above explaining how I imported data directly into Garmin Connect from the fenix:
I am also anxiously waiting for more info about the capability to upload data directly to my iPhone. Garmin says it can be done, but I have not seen how yet.
Stay tuned. More coming.
-Andrew Breitbart 1969-2012
The hypothesis was that by setting the GPS mode to UltraTrac and the Interval to 15 seconds (Sensors stay at the Always On setting) battery life could be extended beyond 24 hours without losing so much detail that it would not be useful for walking.
In my previous battery life test, power consumption was observed to be essentially linear (i.e. power was consumed at the same rate) from 100% to 2% before the watch shut itself off.
I ran a 12 hour test and have projected consumption using a linear trend line.
The results are in! Here's the graph:
After 12 hours power level was still at 53%. Assuming the watch would shut itself off with 2% power remaining, as in the first test, projected battery life for the fenix with GPS set on UltraTrac, Interval set to 15 seconds and Sensors set to Always On is ... wait for it ...
25 Hours 30 Minutes
Looks like it made it! But how is the resolution of the data? Here's the track from BaseCamp:
This is one walk, out and back following the same route (different sides of the same street), with the rest of the time around the house. It's certainly not as smooth as the track generated when the GPS is constantly on (Normal mode), but with the exception of a few minor zigs and zags, it's definitely good enough to serve as a record of where I was.
In UltraTrac mode with the Interval set to 15 seconds, I observed an interesting phenomenon on the home Time screen. Every 15 seconds (coinciding with when GPS was activated for a fix?) the screen would pause for about a second and display this icon in the middle of the screen:
Neither timekeeping accuracy nor any other functions seemed to be affected. It appears the fenix just needed time to complete the instruction set triggered by the GPS fix.
So now it appears we have three battery life times based on configuration:
16 Hours when in Normal GPS mode
25 Hours when in UltraTrac GPS mode with 15 second Intervals
50 Hours when in UltraTrac GPS mode with 60 second Intervals
So, tordnado, what do you think?
Last edited by gaijin; September 14th, 2012 at 07:11.
-Andrew Breitbart 1969-2012
More GPS power cycle interval options: What the doctor ordered.
A graph: Worth a thousand words.
I plotted your excellent data, and if I did it correctly it does look pretty linear. But as you see it's not a slope of 1, which is maybe what you meant.
I'm thinking the slope is an inverse function of how long the GPS is on each time it tries to get a fix. Meaning that a slope of 0.5 suggests it's on for about 2 seconds. In the real world of a hike in the woods we'd expect (and I've observed on my Ambit) that the GPS *may* take more than the minimum to get a fix. And when the GPS needs to be on longer, then of course the battery life will be decreased.
Last edited by or_watching; September 14th, 2012 at 08:35.
Thanks alot! That is really great info. Now the only thing keeping me from buying it today is the looks but you cant do much about that I guess. Since its functions are so great for travelling (world time, finding the way back to the hotel and running) and everyday use I would love a titanium watch with a little more "dressed" looks. But I know myself well enough to realise I cant wait for that! But I hope Garmin is reading this so that they do a bit better in that department next time, the Ambit looks a lot better I think. Once again thanks for all the reporting!
how can I change UltraTrack interval settings ? I have done soft upgrade to 2.40 . In Tracks options I can choose Normal, UltraTrack, Demo Mode - I can't find a interval settings in UltraTrack.
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