A new Google Pixel feature that works to preserve battery health requires users to set an alarm within certain hours in order to work.

The feature, which arrived in the December feature drop for Pixel 4/XL, Pixel 4a, Pixel 4a 5G, and Pixel 5 devices, is designed to aid the long-term health of the battery by charging it more slowly over night.

“Adaptive Charging helps preserve battery health over time by dynamically controlling how quickly a Pixel device charges,” Google says. “Just plug in your phone in the evening, set an alarm and the Adaptive Charging will work its magic.”
…
Continue here:
https://www.trustedreviews.com/news/google-pixel-adaptive-charging-feature-has-a-pretty-weird-quirk-4115540