Power & battery

Check the battery status — Display the status of the battery and connected devices.
Get the most out of your laptop battery — Tips such as “Do not let the battery charge get too low”.
Log out, power off or switch users — Learn how to leave your user account, by logging out, switching users, and so on.
Switch off unused wireless technologies — Bluetooth, wi-fi and mobile broadband can be switched off to reduce battery use.
Use less power and improve battery life — Tips to reduce the power consumption of your computer.
What happens when I suspend my computer? — Suspend sends your computer to sleep so it uses less power.
Why does my computer turn off when I close the lid? — Laptops go to sleep when you close the lid, in order to save power.

Power saving settings

Enable automatic brightness — Automatically control screen brightness to reduce battery use.
Set screen blanking time — Change the screen blanking time to save power.
Set up automatic suspend — Configure your computer to suspend automatically.
Why does my screen go dim after a while? — The screen will dim when the computer is idle in order to save power.

Questions

The estimated battery life is wrong — The battery life displayed when you click on the battery icon is an estimate.
Why did my computer turn off when the battery got to 10%? — Allowing the battery to completely discharge is bad for it.
Why do I have less battery life than I did on Windows/Mac OS? — Tweaks from the manufacturer and differing battery life estimates may be the cause of this problem.
Why is my laptop slow when it is on battery? — Some laptops intentionally slow down when they are running on battery.

Problems

I have no wireless network when I wake up my computer — Some wireless devices have problems handling when your computer is suspended and does not resume properly.
My computer gets really hot — Computers usually get warm, but if they get too hot they can overheat, which can be damaging.
My computer will not turn on — Loose cables and hardware problems are possible reasons.
The laptop fan is always running — Some fan-control software could be missing, or your laptop may be running hot.
Why does my computer not turn back on after I suspended it? — Some computer hardware causes problems with suspend.
Will my computer work with a power supply in another country? — Your computer will work, but you might need a different power cable or a travel adapter.