The iPhone 18 Pro Max offers a huge jump in battery life , partly because the battery itself is physically larger. In a new support document published today, Apple says the iPhone 18 Pro Max has such a big battery that it has additional shipping requirements.
Source: [9to5Mac](https://9to5mac.com/2026/09/19/iphone-18-pro-maxs-battery-is-so-big-apple-had-to-add-this-new-feature-to-ios-27/)