Tested on iPhone 13, 14, 15, and 16 models running iOS 17.6 and iOS 18.4, with battery diagnostics run through Apple’s built-in tools and third-party apps including CoconutBattery and iMazing. iPhone battery draining fast? You charged your iPhone overnight. By noon, you’re at 30%. By dinner, it’s dead. If this sounds familiar, something is definitely […]