About the battery and performance of iPhone 11 and later About performance as batteries age The software and hardware system built into your iPhone is automatic, always-on, and works to provide the best possible performance as battery aging occurs over time The power needs of your iPhone are dynamically monitored, and performance is managed so that it can address these needs in real time
iPhones: The specs, hardware and software components of iPhones 3 The Heart: iOS Operating System What good is cutting-edge hardware without intuitive software to power it? Enter iOS, Apple’s powerful operating system designed exclusively for the iPhone