Who is the endurance of Win7 VS Win8?

Endurance is the standard for judging the energy consumption of an operating system. We all know that the kernel of Win8 system has been upgraded from Win6.1 NT6.1 to NT6.2. Does the kernel upgrade have improved the battery life? Let us tell you the answer through a review video.
Test process:
We have adopted two identical Lenovo hardware notebooks, one with Win7 Ultimate and the other with Win8 Professional. Both computers are equipped with "Power Mark"; — & mdash; a commonly used notebook power test software, which simulates a variety of daily operations to obtain the system's battery life.
First of all, we have adjusted the brightness of these two devices to the maximum, and the power plan has chosen “High Performance”, the power is 100%.
Then open the PowerMark software, set the test mode to "full test" (high load), the test time limit is "remaining 20% ​​power". Then select “test", the system starts automatically opening web pages, watching videos, and so on.
At this time, all we need to do is wait and see if the power of these two machines is supported longer.
After more than three hours, we returned to the evaluation room. At this point, the test results have come out: Under high-load operation, Power Mark shows that the Win8 system can last for 3 hours and 24 minutes; Win7 is 3 hours and 06 minutes. Win8 has 18 minutes more load life than Win7.

Win8: 3 hours 28 minutes

Win7: 3 hours 9 minutes
Evaluation summary:
18 minutes does not seem long, but when you are in a hurry to use electricity Time will be precious. It seems that the upgrade of the Win8 kernel can actually reduce energy consumption and make more efficient use of hardware resources, thus extending the life of the device. For those who have requirements for notebook endurance, you may wish to choose a Win8 device.