Hey guys,my surface book with i7 16GB 512GB and dedicated graphics seems to drain battery much quicker than advertised. Just browsing internet, with battery saver and screen brightness at 25%, no graphic/ image processing. It's been on battery for about 2 hours, and almost 50% of my battery life is gone. After monitoring it closely with BatteryMon, I got a discharge rate of ~16 W sounds like the fan is running. What are you guys getting?