You can modify the power plan for your Windows laptop or PC to strike an optimal balance between performance and power consumption, depending on your usage needs. Changing, customizing, or creating a new power plan is done through: Control Panel > Hardware and Sounds > Power Options > Create a power plan.
The power plan (or power plan) on Windows is a setting that controls how your laptop or computer manages and uses power to provide the right balance between performance and power consumption. Windows offers several power plan options, each with preconfigured settings to suit specific usage scenarios.
Laptop power plans are the hardware and system settings that regulate how the computer manages power usage to conserve battery power (when the laptop is running solely on battery power without an additional power source) or to maximize system performance. Windows 7 offers three such default power plans, known as default power plans:
Balanced (Balanced): This power plan aims to balance power consumption with system performance, ensuring a good trade-off between the two.
Power Saver (Power Saving): This power plan focuses on reducing system performance to conserve as much power as possible.
High Performance (High Performance): This power plan maximizes system performance without making significant compromises in power consumption.

If you're not happy with how these plans are set up, you can set up other custom plans where you choose your own power settings.
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How can you add a customized power plan on a Windows laptop?
To create a new personalized energy plan all you have to do is open it Control Panel then click on the options Hardware & Sound, then click Power Options.
Create a power plan.

Select which category the new plan will belong to (Balanced, Power Saver, High Performance) then choose a name for it.
Related: How to change the function of the physical Power button of the computer in Windows 7 / Windows 8
In my script, I chose the name “BeSmart” with initial settings: “High performance".

In the next window you can choose after how long the screen will close and after how long the computer or laptop will enter "Sleep".

In the case of laptops, here you will find two rows of settings. Settings for when the device is running on battery power and settings for when the laptop is connected to a power source.

You can change the power plan for your laptop or PC and set after how long the device goes into "Sleep", turn off the screen or dim the screen light when the laptop is not in use.
Advanced power plan settings for a Windows laptop or PC.
In addition to the settings mentioned above, advanced power plan settings can also be made for the laptop or computer with Windows.
Go to: Control Panel \ Hardware and Sound \ Power Options, then click on “Change plan settings” and click on “Change advanced power settings".

In the advanced power plan settings, more hardware options are available.

From here you can choose after how long of inactivity to stop hard disk, turn off the screen, suspend USB peripherals, plus many other performance or power saving options.
In conclusion, the energy plans of Windows are designed to help users strike a balance between computer performance and power consumption.