A new leak about the iPhone 18 Pro Max model, which Apple is expected to introduce in the fall, revealed details about the battery capacity of the device. In previously shared claims, it was stated that the series would be the non-foldable iPhone model with the largest battery ever. Latest information shows that this increase is not only a general expectation, but also capacity values are starting to become clear. If the leak turns out to be true, Apple will include a larger battery in its flagship model than it has used so far.
According to the shared information, iPhone 18 Pro Max is expected to be offered for sale with two different battery capacities. While it is claimed that the model with a physical SIM card slot will use a 5,235 mAh battery, the version that only supports eSIM will come with a 5,425 mAh battery. A similar capacity difference emerged last year after Apple removed the physical SIM slot in some markets. The new leak indicates that this approach may continue in the next generation.
iPhone 18 Pro Max may offer a larger battery than the previous model
When compared, it seems that the increase in battery capacity has reached a remarkable level. While the iPhone 17 Pro Max model with a physical SIM card had a battery with a capacity of 4,823 mAh, this value was 5,088 mAh in the eSIM-only supported version. According to the new claim, while the iPhone 18 Pro Max with a physical SIM card comes with a larger battery of approximately 412 mAh, it is stated that the increase in the eSIM version will be 337 mAh. This means a significant capacity increase in both models compared to the previous generation.
On the other hand, it should be reminded that the information in question has not yet been confirmed by official sources. Apple continues to keep the technical specifications of its iPhone models largely secret until the launch event. Therefore, the accuracy of the leaks will only become clear when the device is officially introduced. Despite this, different reports shared recently support the expectation that the iPhone 18 Pro Max may be the standard iPhone model with the largest battery ever.
Battery capacity has not been among the technical data highlighted by Apple for many years. Instead, the company takes an approach that focuses on lifespan and energy efficiency. In addition, it is known that Apple is trying to increase battery life with more efficient processors and display technologies. Offering a higher capacity battery with these improvements can provide longer usage times, especially in intensive usage scenarios.
If the figures in the leak are correct, the iPhone 18 Pro Max will surpass the Samsung Galaxy S26 Ultra with a 5,000 mAh battery in terms of capacity. Of course, battery capacity alone is not a factor that determines usage time. Processor efficiency, software optimizations, display technology and power management also play a determining role in the real usage experience. Therefore, a definitive evaluation of the battery performance of the iPhone 18 Pro Max can be made after the introduction of the device and the publication of independent tests.