In Xubuntu 16.04.3 (and several previous versions aswell) it is not possible to have no power icon in the notification area.
A power icon is displayed even though 'Show system tray icon' is unchecked in Xfce Power Manager.
When 'Show system tray icon' is checked, there are two power icons displayed.
I've searched and I can't find any information related to this in Xubuntu/Xfce.
Is there a way to fix or work around this bug?