Mac book Retina Battery

I just received my Mac book retina yesterday and the battery doesn't last more than 3 hours. I read through the other forums, but the dock doesn't seem to be draining my battery because it operates at 1% only. I keep the resolution to scaled with more space (the second to last in scaled configuration) and am using just safari with my wifi on. I turned of the bluetooth. Even with the resolution set to Best for Retina Display, the battery didn't last longer than 3 hours.Any suggestions?

I agree with Shah_Min, you SHOULD return it but try something else first as this drastically helped me...
Power down
Power on and immediately press Option-Command-P-R until you hear the initialization sound twice.
Release all 4 buttons
I do not claim to know what this does or why it helps, but I live 60 miles from the nearest Apple store so it was worth a try for me...
I immediately started getting 7 and even 8 hours of battery life without touching my settings.

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