And it'll then make predictions based on whether you'll need more battery life that day. "With Adaptive Power, your iPhone can automatically extend battery life on days when you're using more power than usual," Apple explained. "Adaptive Power can predict when you'll need extra battery, and then make performance adjustments to help your battery last longer." To turn Adaptive Power on, just go into Settings > Battery > Power Mode. To get them, go into Settings > Battery > Power Mode and then activate Adaptive Power Notifications.