Install xapm by entering the following commands in the terminal:
sudo apt update sudo apt install xapm
Description:
X program to monitor APM battery status
On laptop computers, the Advanced Power Management (APM) support provides access to battery status information and may help you to conserve battery power, depending on your laptop and the APM implementation. . This package contains xapm(1), an X11 utility that displays the status of the battery.
Homepage: http://alumnit.ca/~apenwarr/apmd/
Version: 3.2.2-15build1
Section: universe/x11