IPhone 18 Pro Max battery leaks suggest massive capacity upgrade

Published On 27 Jul, 2026
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If accurate, this would make it the largest battery ever installed in an iPhone. However, this remains unconfirmed. Earlier leaks suggested significantly lower figures, and Apple has yet to officially comment on the highly anticipated device.

The theory behind the varying capacities is straightforward. By eliminating the physical SIM tray in certain regional markets, Apple can free up internal space to accommodate a larger battery.

This regional split is already anticipated in the iPhone 17 Pro Max, with the eSIM-only version reportedly having about 5,088mAh, and the physical-SIM version around 4,685mAh.

However, the new leaks directly contradict earlier reports. In June, prominent Weibo leaker Digital Chat Station suggested a much more conservative 5,000mAh for the physical-SIM model and around 5,100mAh to 5,200mAh for the international versions.