As the launch date of the iPhone 18 Pro Max draws near, a flurry of leaks has emerged. The most recent set of real-life battery spy photos indicates that the battery capacity of the Chinese domestic variant is anticipated to range from 5187mAh to 5235mAh. Meanwhile, the US version, which adopts a pure eSIM design, could reach an impressive 5567mAh. This marks a roughly 10% increase over its predecessor, establishing it as the Apple model with the largest battery capacity to date. To accommodate this enhanced battery, the iPhone 18 Pro Max's chassis will thicken to around 8.8mm. Moreover, this model will be powered by the A20 Pro chip, crafted using a cutting-edge 2nm process, which boosts energy efficiency by 30%. Coupled with LTPO+ screen technology, it enables the device to last up to two days on a single charge under light usage conditions, while heavy usage battery life sees an approximate 15% improvement.