@nytpu So you probably know this but. My first smartphone from 2010 (Casio Commando) had a 1460mAh battery. Lasted about a day. My Durasport has a 4500 mAh battery. Lasts about a day.
The public always demands they want "more battery life" and news always reports they last the same, but the batteries ARE getting bigger over time (though not by the leaps and bounds the public wants.)
The problem is that the higher capacity is being eaten away by less optimizing and more tracking and background processes, many of which we get no say in deciding on.
I truly feel something was lost from the era where a game programmer could list a bunch of CLI commands to make a game run on any hardware, to today where if the latest tech demo game doesn't work, the answer is "Get a better computer."
The higher capacity of today's computers gives more space, and allows people to feel entitled to WASTE those resources through inefficiency (or siphon them off for adware) because there's so much.