Improve Laptop Battery Life & Usage in Linux Mint (Ubuntu) with TLP :
TLP is an advanced power management command line tool for Linux. It comes with a default configuration already optimized for battery life. At the same time it is highly customizable to fulfil specific user requirements.
TLP supplies separate settings profiles for AC and battery power and can enable or disable bluetooth, WiFi and WWAN radio devices upon system startup.
Terminal commands for installation via PPA: