For this test, we set the Prime's display to 50% brightness, which is still plenty bright and easy on the eyes. Again, this test was setup in the Balanced performance mode for the tablet. In Power Saver mode, which will offer plenty of performance for simple web browsing, you could expect longer up time.
Not the most impressive result for the Prime here but again, with Power Saver mode kicked in, our results could be dramatically different. Also, remember that the Tegra 3 SoC incorporates a quad-core CPU, so twice as many cores are at play here, though power gating on those cores probably significantly reduces consumption.
We'll have to return to our testing in power consumption and update our results with both Power Saver mode enabled and with the keyboard dock snapped in for a bit more life as well.