Why is my laptop slower in battery mode?

Why is my laptop slower in battery mode?

Is it possible that an energy-saving mode has been activated or configured in such a way that it is activated in battery operation?

Perhaps in the energy settings in battery mode on "Balance" and in mains operation on "Best performance".

Because it is set that way in energy management.

Because it saves energy so you can work a little longer.

Because the CPU is throttled, the GPU is sometimes deactivated and the graphics unit of the CPU is used to save the battery.
You can set this in the settings, but it is usually slower than on the connector.

Can you change that somewhere

Yes, look for energy options and click through there.

Very good answer