Surface Pro 2: Battery Results

I just got my Surface Pro 2 yesterday and was wondering what were people battery results I roughly got about 5 hours last time (was mainly on desktop surfing the web with ie). If you have solutions to improve this or settings let us know. Im not really disappointed with the battery life as everything it does it so well, for me anyway. I also out of interest i tried one game of League of Legends to just test it and it drained 30% of my battery in 40 mins (which is fair enough I guess)--- this wasnt included in that 5 hour's mentioned before.

BTW I have a 128gb/4gb ram Surfaces Pro 2