[crote]

The Switch 2 has a 5-hour battery life, and the controllers can charge through the console.

Put the controllers on the device when you're not using it (which seems like the obvious place to keep them), and they'll never run out.

[com2kid]

Sorry I should have specified that is the pro controller, typical use case is a docked switch and the controller is used while on a couch or some such.

Literally the worst case scenario for dramatic reduction in battery life.