So basically, I feel as if the battery life of my new MacBook Pro 15R (w/Touch Bar) is really inconsistent. I find it logical that if I were to turn off the discrete GPU, it would result in power savings, and grant improved battery life overall. I've found a way to enable the dGPU at all times, but I haven't figured a way to do the opposite; Only have the Intel iGPU operating at all times. The latter for me is more than fast enough, and what I want running. Any solution?