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.
On the other hand, if Low Power Mode has been turned on manually, the feature will stay on until the battery is 100% charged. Fix the Yellow Battery Icon on iPhone by Turning Off Low Power Mode. Either trick works to disable the feature, so charge up the iPhone or turn it off yourself, whatever you prefer.