OOOoooOOOOO.There is a app made by some guy after Microsoft dropped status support via there own app which works well on windows: https://www.techspot.com/downloads/7134-xbox-one-controller-battery-indicator.html puts small Icon in system tray showing status of each controller connected in terms of battery life and can play an audible warning if battery gets low. Pretty basic, but does the job and very light. It does take like 20 seconds initially for controller battery life to be detected for the very first time.
Thanks matey!