Xbox 360 controllers come with a built-in battery, but if you want to power them yourself you can. Here’s how:

  1. Open the Xbox 360 case and remove the two screws on the back of the controller.
  2. Remove the battery cover by gently prying it off with your fingers.
  3. Place the battery cover back on and screw it in place.
  4. Close the Xbox 360 case and reattach the screws on the back of the controller.