Rumors surrounding the upcoming iPhone 18 Pro Max have consistently pointed towards a significantly larger battery, potentially the biggest ever in a non-folding iPhone. A recent leak now claims to reveal the precise battery capacities for the device.
iPhone 18 Pro Max screen with app icons and weather.
Dual Battery Capacities Revealed
The leaked information suggests that, similar to previous generations, the iPhone 18 Pro Max will feature two distinct battery capacities depending on its SIM configuration. The eSIM-only variant is reportedly equipped with a substantial **5,425 mAh** battery. In contrast, the model retaining a physical SIM slot is said to house a slightly smaller **5,235 mAh** battery.
A Leap in iPhone Battery Technology?
If these leak figures prove accurate, the iPhone 18 Pro Max could represent a significant advancement in iPhone battery longevity. Historically, iPhones haven't been lauded for their sheer battery size. However, the reported capacities would surpass even high-profile Android competitors, such as the rumored 5,000 mAh cell in the Samsung Galaxy S26 Ultra.
Comparing to Previous Models
For context, the iPhone 17 Pro Max featured a 4,823 mAh battery for its physical SIM version and a 5,088 mAh battery for the eSIM-only model. This means the iPhone 18 Pro Max is projected to offer an impressive increase of approximately **412 mAh** for the physical SIM variant and an additional **337 mAh** for the eSIM-only version, compared to its immediate predecessor.
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