The Switch draws between 0.4 and 0.6 amperes from the charger.

Fixed an issue where the Switch drew 0.4–0.6A from the charger but would not power on.
Charger current draw: 0.4A to 0.6A.
Device would not power on.
Don’t forget to plug in the eMMC; otherwise, you might encounter issues with the P13USB audio/video IC.