Laptop users are concerned with getting the most out of their battery power. KDE provides a power management utility that makes it easy to see your current battery settings and to create power profiles that best match your needs. If you click on the battery icon in your system tray, the Power Management window will open, as seen in Figure 7.4a:
Figure 7.4a: Power Management Window of Battery Widget in the System Tray
If you don't see a battery icon, you may need to click the up arrow in the system tray to view any hidden icons. If it is still not there, you can add this widget to the system tray by clicking on the Panel tool box icon (located in far right corner of the panel) -> +Add Widgets. Search for the term "battery" and double-click the battery icon. You can then click the red X to close the add widget window.
As seen in Figure 7.4a,