RAVPower 45W USB C PD charger
The RAVPower 45W USB C PD charger is a small USB C charger that has more than enough power to plug into your Nintendo Switch and charge at full speed, and keep the battery juiced up while you are playing.
This handy charger is available on Amazon and it is small enough to slide into a Switch case or to keep in a backpack pocket. It's also capable of fast charging an iPhone or Android phone and charging up many other gadgets, which makes it a top notch choice.
$54.99 at Amazon