Most of the Dell gaming systems of recent design require a battery to run at full speed, even on AC power.  This is called Hybrid Power. You will need to replace the battery to restore full performance. [URL]  
I have a dell laptop laptop specs:Dell g5 15 5590 i7 9750h, rtx 2060 , 16gb 2666 ram, 512 ssd My battery is slightly swollen and the technician said we must get it out. When I got it out the rtx 2060 had code 43 and the cpu was capped at 30w and intel xtu was saying current/edp limit throttling. I have a 180w power adapter. What do you think is happening? Does dell limit power from the bios when on ac only? Can the 180w adapter be broken? Could something else be broken?
Dell laptop doesnt perform normaly without battery