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Apple’s iPhone 17 Air to Be Its Thinnest Yet, but Faces Battery Life Concerns

Leaked tests suggest the 5.1mm-thin iPhone 17 Air may require an optional battery case, as Apple plans major lineup shifts in the coming years.

There are going to be new additions to Apple's lineup going forward.
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Overview

  • The iPhone 17 Air, expected to debut in September 2025, is rumored to measure just 5.1mm thick, making it the slimmest iPhone ever.
  • Apple's internal tests reportedly show reduced battery endurance for the ultra-thin design, prompting the development of an optional battery case accessory.
  • The Air model is expected to feature a 6.7-inch ProMotion OLED display, 48MP rear, and 24MP front cameras, bringing high-end features to a non-Pro variant.
  • Dummy unit comparisons reveal that the iPhone 17 Air appears visibly thinner than the iPhone 17 Pro Max, even when both are in cases.
  • Apple plans a split release schedule starting with the iPhone 18 series, launching Pro models in autumn 2026 and standard variants in spring 2027, alongside testing under-display Face ID for future Pro models.