One of the things that most called our attention was knowing that the console in handheld mode, along with the Joy-Con will have mutual feedback.
What does this mean? Well, when we play with the Nintendo switch in handheld mode with the Joy-Con, these can charge the console and viceversa. This will happen when some of those parts have low battery, this way we will be able to play some extra time. For example, if the battery of the console is at 10% and the joycons are at 100%, these will charge the console.
Also, a video showing the insides of the dock