The iPhone 18 Pro Max is expected to feature a larger battery to continue offering top-notch battery life, according to a well-known leaker on Weibo.
See also: iPhone 18 won't be released until next year

Citing supply chain information, a Weibo user known as “Digital Chat Station” reported that the iPhone 18 Pro Max will have a battery capacity of 5,100 to 5,200 mAh. Combined with the performance improvements of the A20 Pro chip, which is manufactured on TSMC’s 2nm process, the device could offer extremely impressive battery life. It is expected to be thicker than its predecessor to accommodate the larger battery.
The iPhone 17 Pro Max features the largest iPhone battery to date at 5,088 mAh. Apple says it has up to 39 hours. A recent test showed that Apple devices are leaders in battery life, with the iPhone 17 Pro Max ranking as the longest-lasting phone tested and Apple tied as the top brand overall.
See also: Apple keeps the starting price of the iPhone 18 unchanged

Therefore, with a larger battery and a more efficient chip, the iPhone 18 Pro Max should comfortably offer over 40 hours of battery life.
Meanwhile, the first foldable iPhone, which is expected to be unveiled alongside the iPhone 18 Pro and iPhone 18 Pro Max, is rumored to feature top-notch battery life. The foldable's battery could be over 5,500 mAh, making it the largest capacity of any iPhone, as well as any competing foldable device.
See also: iPhone 18 Pro & iPhone Fold feature details

The iPhone 18 Pro and iPhone 18 Pro Max are expected to be released later this year, featuring a smaller Dynamic Island, the C2 modem, simplified camera control, a 24-megapixel front camera, and an upgraded main camera with a variable aperture.
