

Tho relationship of nautical miles and knots for speed is really good for navigating over a sphere. There are some handy shortcuts that make quick mental calculations fast and intuitive, specially with an e6b flight computer (not an electronic).
The alternative would’ve been to use euclidean planes, projections and radian transformations, which would’ve been harder to use for navigating.
It’s all up to where you live and how you use the phone.
One day heavy usage is the goal. I charge my S24 to 80% but only lightly call, and moderate chatting. I can make it from 6am to 8pm and still have well over 25% when I get home. Little to no gaming or social networks though.
It helps that I live and work in an urban area with good antenna coverage. So the phone doesn’t use too much power talking to the network. People who live out in suburbs and rural areas have worse phone battery life because the phone has to struggle talking with antennas further away. Battery life is complex and it goes beyond what personal anecdotes can show.