Details:
I have a 15" MacBook Pro (Late 2011 model) with bootcamp to run windows and play FFXIV.

During gameplay, if my brightness setting isn't close to full dark, the battery of my laptop will actually not charge, but slowly drain!

I've tried putting it on power saver settings and like i said lowered the brightness settings, but the drain slowly continues. Now I mean like maybe 5% every hour so it's not a big deal. I'm just looking for a way to decrease how much power the game is using, because it's obviously putting my computer under a lot of stress.