Dock, store and charge your Xbox controllers and ensure your game pad is ready to play as soon as you are. Includes 2 x 850Mah rechargeable battery packs that simply Clip into your controller, removing the need to be constantly spending money on expensive disposable batteries. Once in place, simply drop your controllers on to the stylish charging Dock and the innovative rear contacts will connect with the charging points automatically to replenish the power in your controller. The dock can hold and charge up to 2 controllers at a time meaning you will never again be left stranded with no power mid-game! With full power restored in around an hour and offering hours of gameplay off one full charge, the dock will also keep your controllers charging when in standby mode.