battery drain 6% during 1.5 hr of walking activity. Normal??

Have you used the map page on the display? The map page use is not inclouded into the 36 hours/GPS calculation and if you use the map page as the main shown data page, you will get much higher battery consumption than 4%/hr.

ok.. in that case whats whe best method to reach 36 hours GPS target

Deactivate all other sensors, set display light to "0", don't touch the watch during the walk ...

6.0% battery drain in 1.5 hours would indeed translate to 25 hours of GPS time, but how do you know you had exactly 6.0% battery drain? Are you just taking the battery % shown on your watch before the walk, and subtracting the % shown after the walk? I ask, because the factory battery level indicator doesn't show decimals.

So, for example, if your watch displayed 99% when you began your walk, it may have actually been 98.5%. And if it said 93% when you finished, it may have actually been 93.4%. If you rounded down your walking time from 1:44 to "1,5 hours" for the sake of keeping the math simple, then that translates to 34 hours of GPS battery life. But even if your walk was precisely 1:30 and that you didn't round just that down to the nearest half hour, then that translates to a 5.1% drain, equivalent to 30 hours of GPS time.

30 hours is still less than 36 (though, not nearly as substantially so as 25 hours), so here are a few suggestions to maximize battery life:

1. Turn off gesture backlight, turn down backlight brightness, set backlight timeout to 30 seconds or less, and turn on the backlight "only after sunset" mode.
2. Course navigation, climbpro, and pacepro all draw extra battery power, so don't use them unless you need them
3. Don't leave the map page open when you aren't using the map. It uses a lot of extra battery power to keep the map refreshed. So scroll up to a different datascreen when you aren't using the map.

There is great datafield "Battery up down" which is he probably using. It writes battery status and discharge rate to activity file...

I have about 6% per hour battery drain on bike with GPS+GLONASS, BT Live Track on, Map+Navigation, HR with Polar H10, speed and cadence sensor. In other GPS activities it's about 4% per hour.

Before assuming they "probably" are using Battery UpDown, I figured I'd ask if that was the case, or if they are using the factory battery indicator, because as you can see, it substantially matters, especially when taking a very small sample size such as a 1.5 hour walk.

3811409 said:

Fenix 6 pro rated at 36 hours on GPS

It actually says “up to”. There are a number of factors involved in the ability of the watch to attain that target. You need to acquire more data points over more activities to know for sure. What GPS setting? Smart or 1s recording? Is the watch ‘as is from new’ or have you added any 3rd party features? Any maps showing?

i have factory reset my watch after i upgraded to 9:00.. No Bluetooth was on, No Pulse OX,  GPS setting - Smart, Walking activity is out of the box.. no changes made to the default configuration 

Are you using GPS or GPS+GLONASS/Gallileo?

Can you just try it for a few more activities, ideally some longer activities, before you make everyone here diagnose an issue that may not even exist?

We're spending way too much time assessing the battery drain for a single 1.5 hour walking activity.

Use the watch for a full battery cycle, then tell us if you're still unhappy with the battery life, and we'll go from there.