Charging the Nintendo Switch using the dock is a simple process. First, you need to locate the AC adapter that comes with the dock. Plug one end of the AC adapter into the back of the dock, and the other end into a wall outlet. Then you just need to slide the Switch into the dock making sure it sits down onto the plug in the dock. The system will begin charging immediately, and you can now use the dock to play the Switch on your TV while it charges. To check the charge level of the Switch, you can press the Home button on the controller. The battery icon at the top right corner will indicate how much charge is left.