One automation for each battery was getting crazy. A temperature sensor in most rooms, motion detectors and a handful of door/window sensors. This blueprint creates an automation that manages all batteries dynamically. Really is amazing.
What blueprints do find useful?
https://community.home-assistant.io/t/low-battery-notifications-actions/653754
It’s been around for years, so highly unlikely it’s AI. I wouldn’t call this a starting point for HA, but it did clean up my automations.