Right now you can type "pt-status" in a console window, but there is no continuous battery status display while you are on the desktop.
I have therefore created a little program to display the pi-top battery status on the desktop. It displays a small icon on the task bar.
To download, use the browser and navigate to github.com
Then search in github for pi-top-battery-status
Installation instructions are there.
Questions and suggestions for improvement are most welcome.
Thanks for the update, Rene! I'm fiddling with the new version now.