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Leaks Highlight 2,900 mAh Cell in iPhone 17 Air and Steel-Cased L-Shaped Batteries in iPhone 17 Pro Prototypes

Apple is evaluating these prototype batteries to balance slim design with heat management before its likely September debut.

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Overview

  • Leaks suggest the iPhone 17 Air will use a 2,900 mAh battery inside an ultra-thin 7000-series aluminum frame to maintain a slim form factor.
  • Prototypes for the iPhone 17 Pro show an L-shaped battery encased in steel to improve heat dissipation, structural strength and MagSafe integration.
  • Tipster images reveal distinct battery layouts for the Chinese and US Pro models, with the Chinese variant narrower to accommodate a physical SIM slot and the US variant wider without one.
  • Both Pro battery variants feature electrically induced adhesive debonding technology for easier replacements introduced with the iPhone 16 series.
  • All reported battery designs remain unconfirmed prototypes as Apple evaluates them ahead of a probable second-week-of-September launch.