STEPS TO REPRODUCE 1. Click on the Bluetooth icon in the systray. 2. Click on a connected device. OBSERVED RESULT Only shows information such as name and address of the device. EXPECTED RESULT It would be desirable to also see the battery charging percentage of the connected device. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Kubuntu 19.10 (available in About System) KDE Plasma Version: 5.18.3 KDE Frameworks Version: 5.67.0 Qt Version: 5.12.14
This depends on the capabilities of the device. We show that information in Plasma 5.18 since [1] [1] https://cgit.kde.org/bluedevil.git/commit/?h=Plasma/5.18&id=3686a5acf6cf05960e77172789717f453d576423
So yeah, this is implemented, and if your device doesn't show it, there's probably something wrong with your device.
By "device" you mean the machine that KDE is running on, or the connected Bluetooth device? Because for the latter, my Android phone does show the battery status, so that doesn't seem to be the issue.