Low performance on battery power

[apparentlyarhm]

Well, as the title suggests, my problem is simple. I've observed that when on battery, the GPU performs..well...not up to the mark. CS:GO, for example, performs quite worse than when being plugged in. Well, i know that the GPU throttles down to conserve power, but the GPU is the 940MX (4GB DDR3), and I don't think that is is that power-hungry.

When plugged in, CS:GO returns a smooth 60FPS @ High/Vhigh at 1366x768 (native resolution of the Laptop) but when removing the charger reduces the frames by 20-25. Also, the integrated HD 630 (I5-7200U) don't spit out a perfect 60 at lowest setting (I honestly have no idea about its capabilities, but I think it can)

 

Any valuable suggestions are welcome, and thanks in advance!

 

Specs of the laptop:

I5 7200U CPU

GeForce 940MX 4GB DDR3 GPU

16 GB DDR4 2133MHz RAM

2TB HDD

[EPPHO]

In CSGO you have POWER SAVING option,check it. Also,check if your laptop is using your GT940 instead of integrated GPU while not connected to the cable. It should be in nVidia drivers

[Natsoup]

By default your gpu will limit fps to 30 in all games on battery power. This can be changed in Nvidia control panel.

[apparentlyarhm]

Well, I'll check that.

But what if I want to use the integrated GPU instead?(To conserve battery, of course) what could be the optimal settings?