Change Battery under Devices to Power and show devices that are running on mains

[mehuman]

Currently under the Devices dashboard devices with a battery show the percentage of battery left and devices running on mains power just show -. It would be great if those on mains showed a plug icon.

My use case is looking through devices it can be difficult to tell if a device has fully dropped or is just running on mains.

[karwosts]

Do most of your devices themselves generally have a consistent way to report that they are running on mains power?

Generally we detect battery by looking for an entity (sensor or binary_sensor) of a device that has device_class: battery.

How would we detect mains powered devices? There is a binary_sensor with device_class power, but I don't know if it is consistently used for this. E.g. I have some battery devices that also have a binary power sensor. (Xiaomi temperature/humidity sensors).

I think it's a decent idea but I don't know if we have enough information to reliably implement it.

[mehuman]

Including two screenshots of zigbee devices that present a power source of Mains. The dashboard could just show the plug icon when the power source Mains is detected in the same way when power source is Battery. If neither detected it could revert back to the -.