Are you a hard core gamer? Are you tired of going through hundreds of batteries? YOU NEED TO BUY THIS IMMEDIATELY! The rechargeable batteries work great! They are fully charged in about an hour, and last for hours and hours! The charging dock connects to your Xbox one X perfectly and it locks into the usb port. The batteries even charge when your xbox is off, but plugged into an outlet. An amazing product! Would highly recommend this over the Microsoft charge/plug and play battery pack. Plus this one is cheaper and you get an additional battery!