How to get the battery state?

[schmunk42]

My problem is that I currently need to have my touchpad almost always connected via USB to have it working. I suppose this is due a low battery state, but I am not sure since I can't see the loading percentage at the moment.

I found only #19 when looking for "battery", do you have any advice how to get the actual battery level?

[dos1]

#19 (comment) describes it pretty well. You have to do it manually, as it's not implemented in the driver yet.

[aleksfadini]

I also would like to have any way to know the battery state of my magic trackpad 2 on linux. Even if it means being able to check only when it is connected to a wire, that would still be a big improvement. As things stand now, we have no way to tell really.

[edit- OT] Thank you for making the trackpad work, it's fantastic.

[alexanderadam]

For anyone stumbling over this.
In Gnome you can check the power state of devices under Settings > Power > Devices without having to install or configure anything nowadays:

As the README states the driver was merged in 2018.

Therefore I think that this issue can be closed. 😉

[mwyborski]

@alexanderadam is right, that modifications should be made in the official linux kernel if necessary. Thank you

[alexanderadam]

@mwyborski I think that you can close this issue here, too, right?

[NicoWeio]

For future reference, battery level reporting (USB only) was added in torvalds/linux@0b91b4e.
It also works for me on KDE Plasma, so this issue could indeed be closed.