The K811 keyboard is a wi-fi keyboard that makes use of Bluetooth to connect with your Mac. To see the battery stage of your K811 keyboard in your Mac, you should use the System Data app.
To open the System Data app, click on on the Apple menu and choose “About This Mac.” Then, click on on the “System Report” button. Within the System Data app, click on on the “{Hardware}” part after which click on on the “Bluetooth” part. Your K811 keyboard must be listed within the Bluetooth part. The battery stage of your keyboard can be displayed subsequent to the keyboard’s identify.