When XBOX unlimited controller connects to the rechargeable battery, can last approximately 30 hours in the case of full energy. Please make sure the link cable is connected to the controller when it is charging.
The other side of the rechargeable link cable can connect the USB interface of the X-Box console. You can only play games while it is charging. When the console is shut down, it can charge automatically, so it is unnecessary to turn on the console. When it is fully charged it will stop itself.