iPhone 15 vs 14 vs 13 Battery Life DRAIN Test
Apple iPhone 13 Review [After three months]: Minor yet worthy upgrade
Performance & battery life : Apple iPhone 13 and 13 Pro series review: These are peak iPhones
Apple iPhone 13 review: Lab tests - display, battery life, charging speed, speakers
iPhone 15 Pro Max vs 15 Pro / 15 Plus / 15 / 14 / 13 Battery Test!
Apple's iPhone 13 Series Screen Power, Battery Life Report - Long Lasting Devices
About the battery usage on your iPhone, iPad, and iPod touch - Apple Support
Apple debuts iPhone 14 Pro and iPhone 14 Pro Max - Apple
About Optimised Battery Charging on your iPhone - Apple Support (IN)