I use one of these true wireless Edifier earbuds.
I noticed how Android reports the battery level of these earphones. But Gnome doesn’t.
Turns out, you need to enable the experimental D-Bus interface in the Bluetooth daemon on Linux for Gnome to know the battery level of the connected wireless earbuds.
On Arch Linux (which I use, btw), I had to modify
/etc/bluetooth/main.conf and set:
Experimental = true
You will probably find a
# Experimental = false line in that file that you can uncomment and change from
Then, restart the Bluetooth daemon:
sudo systemctl restart bluetooth.service
And now, Gnome reports the battery level of the earbuds under the Power tab in Gnome Settings.
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