Inspiron 7572: FPS Drops while charging

I have been facing a problem where the FPS of the game drops while the charger is plugged in. The same game is working fine without any lag on my old laptop whihc has an inferior graphic card. The gaming experience is very poor when the laptop is charging, the same gives a much higher FPS of 30 on battery.

I think it is a settings issue, which will solve the issue, can this be solved.

My Config: i7 8th Gen/ 4GB Nvidia MX150/ 1TB HDD/128 SSD