Install upower-doc by entering the following commands in the terminal:
sudo apt update sudo apt install upower-doc
Description:
abstraction for power management - documentation
upower provides an interface to enumerate power sources on the system and control system-wide power management. Any application can access the org.freedesktop.UPower service on the system message bus. Some operations (such as suspending the system) are restricted using PolicyKit.
Homepage: https://upower.freedesktop.org/
Version: 0.99.7-2
Section: doc