Ubuntu Battery Saver TLP and Slimbook

Refer: https://ubuntuhandbook.org/index.php/2020/06/improve-battery-life-ubuntu-20-04-lts/
Refer: https://www.omgubuntu.co.uk/2021/10/slimbook-battery-4-released

How to Install TLP in Ubuntu 20.04

Simply open terminal either from application menu or by pressing Ctrl+Alt+T on keyboard. When terminal opens, run command:

sudo apt install tlp

Install Slimbook Battery from its official PPA

Run following commands in terminal one by one in terminal:

sudo add-apt-repository ppa:slimbook/slimbook
sudo apt update
sudo apt install slimbookbattery

Remove Slimbook and TLP

sudo add-apt-repository --remove ppa:slimbook/slimbook
sudo apt remove --autoremove slimbookbattery
sudo apt remove --autoremove tlp