Battery empty warning notification when bluetooth headphones are running out of battery

[spotlesscoder]

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Problem

The most annoying thing when having a meeting is joining and having your headphones turn off in the middle of the meeting.

Proposal

Depending on the device used, it might not be possible to keep using them during charge. It would be nice if a notification with high importance is displayed to the user when the battery percentage drops below a user-chosen threshold for any of the currently connected bluetooth speakers / headphones like it is already done when the laptop battery is almost empty

Prior Art (Optional)

No response

[danirabbit]

I'm going to transfer this over to the power indicator so we can keep all the power stuff in one spot. There is a draft for handling low power notifications ourselves, but at the moment this is handled by a GNOME Settings Daemon plugin IIRC https://github.com/elementary/wingpanel-indicator-power/pull/229