feat(docs): Add note for USB power in outputs page
@@ -12,6 +12,12 @@ keyboard to USB for power but outputting to a different device over bluetooth.
By default, output is sent to USB when both USB and BLE are connected.
Once you select a different output, it will be remembered until you change it again.
+:::note Powering the keyboard via USB
+ZMK is not always able to detect if the other end of a USB connection accepts keyboard input or not.
+So if you are using USB only to power your keyboard (for example with a charger or a portable power bank), you will want
+to select the BLE output through below behavior to be able to send keystrokes to the selected bluetooth profile.
+:::
+
## Output Command Defines
Output command defines are provided through the [`dt-bindings/zmk/outputs.h`](https://github.com/zmkfirmware/zmk/blob/main/app/include/dt-bindings/zmk/outputs.h)
