In recent Windows 11 preview releases, enthusiasts found references to the so-called "adaptive energy saver" a few weeks ago. Although it was not functioning properly at the time, Microsoft accepted the findings. However, customers using Windows 11 laptops and tablets can now preview the new adaptive energy saver thanks to the most recent Canary build.
With its criteria based on your current battery level, Windows 11's battery saver is now very rudimentary. It can be programmed to start when the battery reaches a specific level, such as 20%. In order to maximize battery life, it dims the screen, turns off many visual effects, restricts background system and app activity, and more when activated.
Microsoft is adopting a different strategy with the adaptive energy saver, requiring the operating system to activate or deactivate the energy saver depending on additional variables like the system load or the current power condition. As a result, power saver may be activated at higher battery levels than merely 20% or 30%. Furthermore, it won't darken your screen, which is a crucial feature for portable electronics.
The new adaptive power saver is an opt-in feature, according to Microsoft's release notes for Windows 11 build 27898, which was made available last week. This implies that the percentage-based energy saver will still be the default and that you will need to manually enable it. However, as part of the settings initiative, Microsoft is disabling adaptive energy saving for certain insiders without their permission. You can still disable it by going to Settings > System > Power & Battery.
Shortly after Windows 11 was widely criticized for being excessively resource-intensive, energy-inefficient, and not suitable for portable gaming consoles, the new power saver was released. Microsoft revealed a "bloat-free" version of Windows 11 designed especially for portable gaming devices in order to allay those worries.