The upcoming iPhone 16 Pro Max is rumored to pack a more powerful battery cell with increased energy density, allowing for longer battery life. To address heat dissipation concerns, Apple is reportedly using a new stainless steel battery case that provides better heat resistance. This design enhancement, if successful, may be adopted across all iPhone models in 2025. The iPhone 16 series is also expected to undergo design changes, with the base model featuring a pill-shaped camera island and the Pro models likely receiving an expanded Action Button and a new Capture Button.