For [a device], break down
power across compute, radio,
display and idle leakage. Which
single change extends battery
life most, and what does it
cost in performance?

Where the Power Actually Goes

The power budget, and the one change that moves it.

Prompt

For [a described device], break down where the power budget goes across compute, radio, display and idle leakage. Then tell me which single change would extend battery life most, and what it costs in performance.