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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.

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.