Questions related to the built-in Battery saver app used to conserve battery.

With Battery Saver, you can turn off all non-essential features and conserve battery. When Battery Saver is on, some Windows features are disabled or behave differently.

Battery Saver also helps to limit background activities such as live tile updates, and allows to restrict background usage of a particular application.

More about Battery Saver:

  1. Battery saver - WP 8.1
  2. Battery saver - Windows 10