Just want to note that Low Power Mode (LPM) on Apple Watch Series 7 is really something to keep an eye on.
I took mine from the charger by 7:00 and now, 20:00 with one hour of functional training, battery meter is showing a whooping 75%.
If a simple arithmetic extrapolation is to be made, it could easily last 52 hours, two whole days!
Of course, I miss the always on display, but this LPM can be something useful when traveling.