Nyko’s Charging Base lets you conveniently charge and store two Xbox One (tm) wireless controllers. The Charge Base features two NiMH rechargeable NiMH batteries with special contact point that allows for a simple drop-in and charge solution for wireless controllers. The AC-powered dual port dock plugs directly into any standard electrical outlet. There are no cables required. Drop and Charge technology allows you to charge without removing the batteries. Included are two NiMH rechargeable battery packs. Dual port charging dock charges both wireless controllers simultaneously.