system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 Why do laptops (almost) always get their expectation of remaining battery life wrong?
gpt
if you boot up your laptop and then let it idle for half an hour, the app that calculates battery life assumes that with THIS processor load you'll have hours-and-hours of standby-time

now you start playing a game, processor works 66% capacity, graphics card kicks in, heat rises, fans pop to active...

and therefore, now the app assumes: **29 minutes** (and starts planning to dim your display)