iPhone 17 Pro Max Battery Capacity Leaks, Showing Significant Increase
CUPERTINO, CA – September 7, 2025 – Leaked battery capacity figures for the upcoming iPhone 17 lineup reveal a substantial increase in power for the Pro Max model, with a 19% jump over its predecessor.The information, reported by 9to5Mac, suggests Apple is prioritizing battery life improvements alongside other enhancements in its next-generation iPhones.
Apple is expected to unveil the iPhone 17 series tomorrow, September 8th, at 10 AM Pacific Time, alongside new Apple Watch and AirPods pro 3 models. A key differentiator in the new lineup will be the move to eSIM-only models in the US, Europe, and other markets, while continuing to offer physical SIM trays in regions like China due to local regulations. This shift to eSIMs is also expected to contribute to slightly improved battery life.
Here’s a breakdown of the leaked battery capacities:
iPhone 17: 3692 mAH
iPhone 17 Pro: 4252 mAH
iPhone 17 Pro Max: 5088 mAH
iPhone 17 Air: 3149 mAH
The iPhone 17 Pro Max’s 5088 mAH capacity represents a significant upgrade. Apple is also leveraging advancements in chip technology, with the A19 and A19 Pro chips fabricated on TSMC’s N3P 3-nanometer process – an even more efficient process than the N3E used in the iPhone 16 series.
While the base iPhone 17 will see a modest 4% battery increase, it will also feature a larger 6.3-inch display and likely ProMotion 120FPS technology, possibly offsetting the capacity gain. The new, thinner iPhone 17 Air will have a battery capacity 17% less than the base model, a trade-off for its slim form factor, but still exceeding earlier rumors of sub-3000 mAH capacities.
