Game lags and stutters when laptop is plugged in
So I have DA:I on PC, on my ACER laptop to be exact and when it's on battery power it runs great, it's on medium to low settings and very rarely do I ever have lag/frame rate issues. But the second I plug it in framerate issues galore. It skips and lags and is unplayable, even in the main menu with the templars and mages marching it does this.
I've tried turning down the settings and it does nothing, stays the same. I've only seen this on DA:I, no other game. Which sucks because I'm loving this game but don't have time to play it really until my battery dies...
My graphics card is an NVIDA GeForce 850 I believe with 2 GB of dedicated video ram. Like I said, it runs fine when on battery but the second I plug it in it lags, even after I've let it charge a bit it still lags. Sims 4 doesn't do this, Skyrim, Diablo 3, Arkham Origins, no other game does this, only DA:I...
What can I do so I can play it even when it's charging?