Trenro 2 Pcs Black Battery Pack Cover Shell Case Kit for Xbox 360 Wireless Controller Trenro replacement battery pack for xbox360 Wireless controller. Material: Plastic. Brand New and High Quality. Size: 2.25" x 1.4" x 0.7". Compatible Batteries: 2 x AA (NOT included). Package Contents: 2 x Black Battery Pack Cover for Xbox 360 Wireless controller.