Quick report for everybody who is unsure about battery life on long ultras: I started with 100% and ended with 35% left - which exceeded my expectations Run time ca. 23h Course navigation enabled, but checked map only occasionally (i believe this is important to maximize runtime) Backlight off (during the night i used my headlamp) Phone connection off 2 ANT+ sensors connected (HR+Stryd)

Battery life - amazing!

Heikoo 7 days ago

Quick report for everybody who is unsure about battery life on long ultras:

I started with 100% and ended with 35% left - which exceeded my expectations
Run time ca. 23h
Course navigation enabled, but checked map only occasionally (i believe this is important to maximize runtime)
Backlight off (during the night i used my headlamp)
Phone connection off
2 ANT+ sensors connected (HR+Stryd)

Hi Heikoo , thanks for sharing!
I do not plan on doing ultra runs, but good to know that the FR955 is capable of supporting it.

One question, as you do not mention your GPS settings, was it set on "Ultra Trac"? Or did you keep it on the default "Automatic" aka SatIQ?

Personally for my running, biking and hiking I use "Automatic" for everything and definitely can confirm, that you can for example do two days of long hikes or bike traveling with 6-8 hours daily and still will be safely above 20% battery.

0 Heikoo 6 days ago in reply to Grumpy from dawn till dusk

sorry, forgot to mention this important detail: GPS only - SatIQ will consume substantially more (of course less than dual channel, but slightly too much for very long runtimes).

Ultratrac has been useless (in any watch) since it was introduced more than 10 years ago - the sacrifice in accuracy is too massive.