Powertop is a tool to diagnose issues with power consumption and power management to help set power saving settings.
sudo pacman -S powertop
Debian based (Ubuntu, Mint, Raspbian ..etc):
add-apt-repository ppa:eugenesan/ppa apt-get update apt-get install powertop -y
PowerTOP has been installed, you can use the following command to know more about it.
Profile battery usages
Following command will generate the HTML file called powerreport.html Open the report in your favorite web browser.
sudo powertop --html=powerreport.html
powerreport.html file will be stored on DIR where you are running this command.
The Tuning tab of the report shows the actual parameters suggested by the tool to apply to save power
For more information: https://wiki.archlinux.org/index.php/powertop