Laptop performance in network operation extremely bad?

If I use the laptop without mains operation (ie with the battery), everything works perfectly and without a trailer. But as soon as I charge my laptop everything starts to lay down so much. The performance is generally extremely bad as soon as I charge it.

I've already checked in the Task Manager if anything changes when I use the battery or the charging cable. But nothing changes there.

It was not like that in the past and I did not change anything.

Do you have any ideas what I can do about it?

Too little information.

It may be that your laptop is set to use high performance on battery power and low power mode when powered on.

Could I check that? Bzw change?

What information do you need?

1.Windows bar> Battery icon> Power Options> Power Save Settings> Advanced Settings

2. Look under Windows bar> Battery icon> Power Options to see if maximum power is set.

3. Which Windows and the details of the PC e.g. Processor, etc.