Battery gains expected to add heft to next-generation iPhone Pro models
Apple’s upcoming iPhone 18 Pro and iPhone 18 Pro Max are widely anticipated to receive noticeably larger batteries than their direct predecessors. Industry sources suggest these capacity upgrades will be accompanied by a redesigned camera system, a combination that will likely push both flagship handsets into thicker and heavier territory compared to the iPhone 17 Pro series.
Leaked dimensions point to a heavier, thicker design
Prominent leaker Ice Universe recently shared what may be the final weight and thickness figures for the iPhone 18 Pro Max on social media platform X. The account posed a question to followers, asking whether they would accept a device approaching 9 mm in thickness and weighing 240 grams if it meant securing a substantially larger 5,500 mAh battery. While framed as a hypothetical, the numbers align closely with earlier reports of Apple adopting a 5,500 mAh cell for the range-topping model.
At first glance, a move to 240 grams represents a modest increase of just 7 grams over the iPhone 17 Pro Max. In everyday handling, however, even small gains can shift how a device feels in a pocket or during prolonged use. When paired with a thickness near the 9 mm mark, the cumulative effect may be notably different from the current generation’s profile.
A surprising thickness gap between Pro sizes
An interesting dynamic appears to be shaping up between the two Pro variants. A separate leak recently indicated that the smaller iPhone 18 Pro could measure between 9.9 mm and 10.9 mm thick, which would make it the thicker device in the lineup by a clear margin if the 18 Pro Max lands closer to 9 mm. This would mark a reversal of the usual size hierarchy, where the larger model typically carries the most bulk.
Regardless of which figure proves accurate, the consensus among observers is that most users will be willing to accept a minor trade-off in slimness and weight in return for meaningful gains in battery endurance. Apple’s recent history has shown that aggressive thinness can come at the cost of real-world stamina, and a thicker chassis with a generous cell inside could address a longtime priority for iPhone buyers.
Sources: x.com, unsplash.com