Laptop screen darker than usual, what to do?

Hi, since last night I have the feeling that my laptop screen is darker than usual, when you restart it is probably again for 1. 2 minutes everything is fine but then it would get darker again, what can that be?

Possibly an empty battery, but it can also be an old battery.

This will be due to the energy saving mode or low battery level.

Have you already tested both?

Enter "energy" at the bottom left in the search field and look for the "savings plan" and adapt it.

Connect the device to the power supply, then it should have full juice.

Test both times.

He is always on the electricity because the battery has been dead for years

Hangs on the cable all the time

Your laptop may automatically adjust the> brightness. You can turn that off

Okay, maybe it will darken anyway because the battery is now completely defective. If you can take out the battery, I would.

Where can you leave that?

Have to look in the settings under brightness level