Some concrete reasons I have for wanting that extra battery life: camping, hiking, and road tripping.
I can keep up with charging when I have a predictable schedule. When I don’t, I’m always running out of battery and often in the worst moments, i.e. when I’m just starting a hike.
It’s my experience charging it in the car and while camping with portable batteries that makes me want more battery.
Can charge in the car, sure. Will I actually charge it in the car? From experience, it’s a constant struggle because I’m outside of my normal routine and I’m not usually seeing the low battery warnings while I’m in driving mode. I often realize when it’s too late, and then my watch is dead til I’m back on the road for a major segment.
And I just prefer to have fewer things to worry about each day so I can focus on why I’m traveling in the first place.
I can keep up with charging when I have a predictable schedule. When I don’t, I’m always running out of battery and often in the worst moments, i.e. when I’m just starting a hike.