Legacy. Hermann Ebbinghausâ lasting contributions to the field of psychology are multiple. In addition to being the first psychologist to study areas of human learning and memory, Ebbinghaus contributed greatly to the establishment of experimental psychology.
This includes dimming the display slightly, stopping Mail push and fetch, turning off background app refresh, turning off Hey Siri, and a few other iOS features. By turning these features off, the battery life of the iPhone is extended dramatically, and when Low Power Mode is enabled the iPhone battery icon is yellow to demonstrate this.
When I plug in the charger, the big red battery on the locked screen is red, low and doesn't appear to be charging. When I unlock the screen, the small battery symbol on the upper right is green with a bolt. When I unplug it, the battery symbol in the upper right is low and red, but the phone seems to be charged.