Wasserstein 700mAh Controller Battery Packs and Charging Cable for Microsoft Xbox Wireless Controller 2020 Model (Xbox Series X/S, Xbox One) (2 Pack), The Wasserstein Controller Battery Pack allows you to switch out your controller’s AA battery compartment for a rechargeable battery made specifically for the New Microsoft Xbox Wireless Controller. It can be charged via USB while attached to the controller or charged by placing them on their own charger. The batteries are fully charged within 2 hours and can last up to 4-8 hours of gaming or with minimal use.