As part of a huge set of improvements, new stuff and fixes that Microsoft just dropped on Insiders with build 15002 comes news of a bit of a test within a test, this one regarding Windows 10 battery life. As noted by the Windows Experience blog post, Microsoft is testing out battery life improvements on a small set of Insiders:
We are running experiments on a small set of Insider devices to evaluate an upcoming Windows 10 Creators Update feature which helps improve Windows battery life. Depending on the experiment configuration, you may see one or more applications reported as “throttled” in the task manager (see insert). The experiment should have no noticeable impact on your user experience and we look forward to hearing your feedback. Please share your experience with us through the feedback hub (under “Power” category & subcategory “throttled Applications”). In support of this experiment, some of you will also see a new power slider in the battery flyout; we’re still experimenting with these power modes that this slider sets. Stay tuned for more updates mid- February 2017.
Of course, any battery life improvements are always welcome, you just can't have too much battery life! Let us know if you're seeing the experimental changes, and how it's going for you.