How Adaptive Power worksYou’ll find the Power Mode screen in Battery settings. Head to the iOS Settings page, then tap Battery: Here you’ll see details of your recent battery usage, together with the apps that you’ve been using the most (tap View All Battery Usage for more details). To enable or disable Adaptive Power, tap Power Mode then use the Adaptive Power toggle switch. You can enable Low Power Mode from the same screen, either in tandem with Adaptive Power or separately to it. Other ways to save battery lifeThe old display brightness trick still works for saving battery life.