joel16 has released a new version of his Nintendo Switch app that tells you all about the system:

SwitchIdent 0.2 :

Built using the latest version of DKA64 toolchain and libnx.
Properly display system region.
Displays battery percentage and charging status.
Displays battery charger type.
Displays if battery charging is enabled.
Displays if ample power is supplied.
Displays Wireless RSSI signals and quality in percentage.


Now uses SDL2 with GPU hardware acceleration.
Now uses shared font.
Minor UI changes. (Displays versions and icons for each field)


Values that change in real time are now properly refreshed. (Battery percentage, charging state, dock state, etc).