TL; DR
- Digital Chat Station says the China version of the iPhone 18 Pro Max could pack around a 5,000 mAh battery.
- International prototypes reportedly go higher, with some testing up to 5,100 to 5,200 mAh.
- The A20 Pro chip (rumoured 2 nm) could push battery life even further, if Apple keeps efficiency gains on track.
A new supply chain leak suggests Apple may push battery capacity higher on the iPhone 18 Pro Max. According to Digital Chat Station on Weibo, the China mainland version (likely the one with a physical SIM slot) of the iPhone 18 Pro Max will likely land around 5,000 mAh, with some variance depending on final production.
The same leak claims international prototypes (likely eSIM-only variants) have tested higher capacities, with the upper range hitting around 5,100 to 5,200 mAh.
If these numbers hold, Apple would move past the iPhone 17 Pro Max, which sits at 5,088 mAh. The change is not massive on paper, but it still means Apple is inching upward on raw battery size, especially for the Pro Max, unlike Samsung which is sticking to just 5,000 mAh.
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The leak also ties into the expected A20 Pro chip, which is widely rumoured to shift to a 2 nm process. That would matter more than the mAh jump alone, since Apple typically relies on chip efficiency to deliver great battery life.
The iPhone 18 Pro series is expected to launch in September 2026, so more prototype leaks should surface over the next few months.
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