Why Laptop Performance lower on batteries

Why is my game running slower than expected when on batteries ?

The answer is, when your laptop is running on batteries, it tries to save power by reducing the clock speed. Thus the full speed of the CPU is not used and a lower clock speed is set. This is what that causes the game's poor performance.

How can i get the maxinmum performance on batteries ?

Performance can be gained by sacrificing power. So all you have to do is goto the
Control Panel » Power Options » Change the Power Scheme from Portable/Laptop to Home/Desktop. (Windows)

By doing this the laptop does not uses power saving schemes and your game will run at a better performance.

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