An accessory that all Xbox One owners should have is the Energizer 2X Charging System. It keeps your Xbox One controllers powered and ready for use. No more worrying about having to replace your AA batteries in the middle of a game. It charges up to two controllers at once, and has green and red LED lights that gives you the status of your battery pack while it’s charging.
More details: http://www.windowscentral.com/energizer-2x-charging-system-xbox-one