Hidden features are a staple of Nintendo consoles; where other manufacturers may drag you through a twenty minute tutorial after ever major update, Nintendo often prefers to give you the basics and then let you discover all the little twiddly bits in your own way.
And as it happens, the Joy-Con controllers and the Pro Controller for the Switch all have a 'hidden' power button which you can see in action in the video above. By just pressing the sync button once the controller powers down immediately and without hesitation.
It's not likely that you're going to be hitting this recessed button by accident and being able to turn a controller off does have a handful of useful applications. It's not going to set the world on fire any time soon but it's a nice little quirk.
Think you'd make use of this feature? Let us know with a comment down below.