If you'd like to save on Nintendo Switch 1 controllers to use with your new NS2, you can find several on sale at Amazon

The Anker Nano Power Bank has a built-in USB-C cable, so if you forget to bring one, you can still charge your Switch 2 without having to scrounge for a spare. At 10,000mAh, you should be able to get at least one full charge out of it, which is pretty great considering how small and compact it is (4.09 × 2.06 × 1.02 inches).