Settings -> Devices & connections -> Controllers & headsets -> (Select your controller) -> (Three dot menu) -> Update now.
(Blanked out the reflection of my garden)
Settings -> Devices & connections -> Controllers & headsets -> (Select your controller) -> (Three dot menu) -> Update now.
(Blanked out the reflection of my garden)
Most things that are powered have microcontrollers in them these days, and that usually means firmware of some kind - it’s not always “field updatable”. A product I was involved in the development of used a fairly standard li-ion battery pack, and part of the manufacturing process involved making sure the firmware on the batteries had been updated correctly