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.
Summary â why the battery icon is yellow on your iPhone 6. 1  Low Power Mode is enabled. 2  You can enable Low Power mode via a pop-up that appears when you have less than 20% battery life. 3  You can also enable Low Power Mode by going to Settings > Battery > Low Power Mode.