How can I maintain laptop performance when on battery power?

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Whenever I unplug my laptop all its performance goes down including browsing internet, streaming videos, playing videos in vlc media player. It gives slow response to tasks it is commanded. It was suggested to use ‘high performance’ mode instead of ‘power save’ or ‘Balanced’ mode. It worked pretty fine but that will certainly effect battery life & time. I also installed a fresh copy of Windows but the problem is same. So please suggest me a better solution.

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