This program provides you the duration of performance or battery life. It is user friendly as just open it & adjust the backlight slider.
Activate the "Energy Saving" - and your laptop can run for up to two times longer. There is a lack of productivity? Retarding system? Not enough FPS in games? Turn on "high performance" to turn off all power-saving features and improve performance.
Moreover, it can be switched by means of “hotkeys» Alt + Pause. Use a utility program NextScheme, to switch modes in your scripts or programs.