Android Authority spotted code strings that reference Adaptive Charging in the latest version of the Pixel Watch Management Service system app, though the feature isn’t yet available to use. It’s also unclear which Pixel Watch models might be supported, or when it will officially launch.

Adaptive Charging is a machine learning-powered feature used on Pixel phones, which learns your charging habits and charges the phone at different rates depending on your usage. If you plug it in overnight, the phone will eventually charge slowly at these times, while if you tend to top it up at regular intervals, the battery will charge quickly.