Kerry Wan/ZDNETDay one of Apple’s WWDC conference is over, and my brain has been wrapped around one particular feature ever since. It wasn’t announced during the opening keynote, nor did it make it onto the all-encompassing graphics chart of iOS 26 features, but it’s a big one — if it works.Also: Everything you might’ve missed at WWDC 2025: iOS 26, Liquid Glass, MacOS Tahoe, moreThe feature I’m referring to is called “Adaptive Power,” a battery conservation tool that’s baked into the Power Mode settings in iOS 26. You’ll have to dig through a few columns to access it within the Settings app on the developer beta. Once you turn it on, your iPhone will automatically throttle certain background tasks to help you conserve battery whenever it detects high-performance workloads.In Apple’s words, “When your battery usage is higher than usual, iPhone can make small performance adjustments to extend your battery life, including slightly lowering the display brightness or allowing some activities to take a little longer.” Exactly how aggressive this power-saving mode is remains to be tested, but if it works only when you’re truly pushing your iPhone — like recording videos, editing photos, or gaming — then it’s a feature many users may appreciate. More