This board is an additional (TOP) board that includes the controlling buttons and batteries, USB-C Power port for XB series X|S controllers, It may fix issues such as your controller NOt charging, one of the buttons No Response, NOt recognising any chargers or not communicating with the dock.
If you cannot return the controller back to reseller for repair, or do not want to pay the high $$$ repair price quote for repair, this solution is save money for you.

Compatible with XB Series X & S Wireless controllers (model: 1914), NOT FIT for XB one standard, XB one Slim 1708 and other Controllers.

Part Numbers: M1107089-008, M1107089-007, and compatible with OLD version board part numbers: M1107089-006

What's in the box:
. 1x NEW USB-C Power & LB RB Buttons TOP Circuit Board (LATEST edition)

NOTE: The controller will need to be disassembled to install, this will void any warranty.