Macworld One of our favorite new features of the iPhone 15 is the ability to limit charging to just 80 percent. For years now, some Apple products have had an optimized battery charging feature that takes into account your typical daily charging and usage routine and will only charge your iPhone or Mac up to 80% when it has determined you’re unlikely to need more. But the iPhone 15 and 15 Pro introduce a third option: force charging to stop at 80 percent. It’s a great option for those concerned about the long-term health of their iPhone batteries, as keeping a battery fully charged causes it t…