The graphical element on Apple’s mobile operating system that visually represents the remaining power in a device’s battery. It typically appears in the status bar of iPhones, iPads, and iPod Touch devices. For example, a fully filled indicator means the device has a full charge, while a red indicator signals critically low power.
The element’s prominence is due to its direct correlation with device usability. Its visibility allows users to proactively manage power consumption and avoid unexpected shutdowns. Historically, it has evolved from a simple graphical representation to include a percentage indicator for more precise feedback, reflecting a focus on user empowerment and information accessibility.