Reduced Battery Life While Watching Videos( retina MacBook Pro) My MacBook Pro(15" retina) has been with me for about 6 months. While doing work(not processor intensive) I get about 8 hours of battery life(compared to Apple's claim of 7) and that is great. 

But as soon as I try watching a video off the internet(even 1080p videos stored in the hard drive play do not really deplete the battery drastically), the huge battery reserve suddenly shows only 3 hours are left(at 100% charged..)

What should I do?? I've checked and all this happens on the intel graphics card and not the nvidia's too!!

HALP!!