The Energy Saver mode on Windows 11 helps extend battery life but has limited customization options. Microsoft is currently beta testing a new Adaptive Energy Saver mode that adapts to user behavior and device usage patterns. This feature, discovered by a user named PhantomOfEarth, is functional and reportedly reduces battery usage effectively in the Dev and Beta environments. It suggests that Microsoft may roll out this feature in future updates, enhancing users' control over energy management.