Apple makes both the phone AND the chip inside it, so they work together perfectly... like LEGO blocks designed for each other. Their chips are 2-3 years ahead in efficiency (they get first dibs on TSMC's newest process nodes) and iOS is ruthless about killing background apps.

Google just started making chips in 2021, Samsung's are inconsistent, and Android's open philosophy means apps run wild in the background... draining battery.

iPhone = perfectly tuned Formula 1 car where every part is optimized together. Android = modified street car with more freedom but less efficiency.

Control + cutting-edge chips + aggressive app management = all-day battery with smaller batteries.