Battery life Fenix7 silver and cold weather

SanderW said:

navigation

Did you have the map page open all the time? That would be a reason for the high power consumption. This page consumes a lot of power, because many pixels of the MIP display have to be updated constantly.

Yes, indeed I had. I followed a route with many turns, so I had to keep a close eye on the navigation.
It seems to me that if you as a manufacturer offer this option on your watch and even actively advertise with it, the watch should be able to handle that quite easily...

Unlike your Ambit 2, the fenix has a MIP (memory in pixel) display. This display is one of the reasons why the battery of the fenix lasts so long. With a static display, the display consumes almost no power. Power is only consumed when the display status of a pixel changes. The more pixels that need to be updated, the more power consumption. Since almost all pixels have to constantly rebuild themselves during movement, if you have constantly called up the map page, the display consumes a lot of power at that moment.
Therefore it makes sense to have another data page open as often as possible, and to switch to the map only when necessary.
If you google the term "MIP display technology" you will get more information about how this technology works.

SanderW said:

It seems to me that if you as a manufacturer offer this option on your watch and even actively advertise with it, the watch should be able to handle that quite easily..

Here is the advertisement for the display built into the fenix :

https://www.garmin.com.sg/minisite/garmin-technology/wearable-science/chroma-display/

Thanks! The technical working of the display is clear for me.
But this also means that when using the watch on a MTB trip you can't use it longer than about 6 hours.
That's pretty bad for such an expensive watch...
I didn't find a method for navigation without using the maps. For example only a breadcrumb. Or didn't I look well?

Its not bad. It's state of the art for such a small device with that small battery. 
Drive your car with full throttle on the highway. Your gas will go empty fast. 

Some for the map display. It's full throttle for the CPU and display. 

If you expect long battery life because you bought an (not so) expensive watch. You're wrong.
And it's even a very common useless argument. 

I understand but for example with the Suunto I could easily do a 10h ride with continues using the navigation.
And that is a watch of almost 10 years old...
So from a user perspective it's not a improvement.
Yes, it looks fancy but that's not why I bought a sportwatch. :-)

And the Suunto also had a color display and full graphic maps?

If you want extended battery life go with the X, Enduro, buy an EDGE device or switch off the map display and enable turn notifications. 

(or carry a small power bank with you)

I just read that setting the map details to low will help a bit too.

SanderW said:

I just read that setting the map details to low will help a bit too.

Turning your backlight OFF instead of using it at 100% as you said you did will save a LOT of battery reserve.  The backlight is not required on a MIP display when used outdoors during the day.

HTH

Thanks! I will do that next time.