What's your favorite handheld consoles accessories?

[Heatman]

The same way bigger game's console and PC have accessories which gives you a better playing experience whenever you're playing is the same way handheld consoles come with accessories of its own to give gamers using it a better gaming experience.

 

For my Nintendo Switch console, my favourite accessory for it will be the Nintendo’s Switch Pro Controller. I play so much with the game connected to my TV, so using the Pro controller gives me a better connection with the game. 

What's your favorite handheld console accessories?