Weibo leaker Ice Universe today revised the expected iPhone 18 Pro Max thickness, lowering that figure from 8.8mm to 8.75mm, bringing it exactly in line with the iPhone 17 Pro Max. The change, reported by AppleInsider today, came without any explanation. Separate claims from Digital Chat about a battery in the 5,100–5,200 mAh range and a weight of over 240 grams, from Instant Digital, remain uncorrected and open questions according to trusted reviews.
According to reliable reviews, the 6.9-inch display footprint is expected to remain unchanged. Whether the phone gets anything meaningful inside that immutable shell is a tough question, and the current evidence doesn’t answer it.
How the “thick pro max” story was framed
The thickness leak is the middle chapter in a long rumor thread. Last November, Weibo leaker Instant Digital claimed the iPhone 18 Pro Max would be slightly thicker than its predecessor and weigh more than 240 grams, making it the heaviest iPhone since the iPhone 14 Pro Max, MacRumors reported three months ago.
Ice Universe added a specific number three months ago: 8.8mm, compared to 8.75mm on the iPhone 17 Pro Max. MacRumors described the Ice Universe as a “frequently-accurate” leak, and the figure quickly spread as a working expectation for the device. The digital chat station later offered a rationale: a battery in the 5,100–5,200 mAh range, up from the 5,088 mAh cell in the eSIM version of the iPhone 17 Pro Max, which Trusted Reviews reported three months ago. The MacRumors show put it together in early April: slightly thicker chassis, bigger battery, heavier phone.
Hope was waning before today. Two months ago, MacRumors noted that any thickness increase might be too small to show up in physical fake units, a quiet signal the 8.8mm figure was under pressure heading into June.
What changed and what didn’t in the iPhone 18 Pro Max thickness leak
The difference between 8.8 mm and 8.75 mm is 0.05 mm. Hand or pocket comparison won’t register it. The correction is important for another reason: the same source changed the specified number without any justification, while the rest of the film’s battery and weight claims remain untouched.
An updated image of Ice Universe appeared today with no explanation for the change, AppleInsider reported. Supply-chain leaks don’t come with changelogs. It is not known whether the revision reflects a different production model, a change in measurement methodology, or updated specifications from further down the supply chain.
The Digital Chat Station’s battery rating is still 5,100–5,200 mAh, compared to 5,088 mAh in the current model, according to reliable reviews. It is said to have increased to approximately 112 mAh inside a chassis and is now rumored to have the same thickness as its predecessor. Improvements in battery chemistry could provide modest efficiency gains without additional size, so coupling is not impossible, but none of the current evidence confirms it.
According to MacRumors and Trusted Reviews, the weight claim of over 240 grams from Instant Digital has not been revised. Both figures were part of the same case for a thicker chassis. thickness changed; They didn’t.
iPhone 18 Pro Max vs iPhone 17 Pro Max: What’s the real difference on the outside?
Based on current leaks, not much. According to Trusted Reviews , the 6.9-inch display footprint remains the same, and the revised 8.75mm thickness matches the iPhone 17 Pro Max perfectly. According to Apple Insider, the iPhone 16 Pro Max measures 8.25mm, meaning the Pro Max line has already grown thicker in recent generations.
The most significant changes are expected to be on the interior. The iPhone 18 Pro lineup is said to include a smaller dynamic island, Apple’s in-house C2 modem, a simplified camera control system, and a main camera with a variable aperture, according to MacRumors Show. Each of those changes uses engineering resources without changing the phone’s external dimensions.
In the same post that revised the thickness figure, Ice Universe said Apple has focused its “focus and energy” on the iPhone Ultra this cycle, Apple Insider reported today. This is a plausible explanation for the standard Pro Max chassis, but it comes from the same unconfirmed post as the revised thickness number, and no independent source has confirmed it.
What Battery and Weight Claims Mean for Buyers
A gap between two thickness figures is never going to affect anyone’s buying decision. A meaningful battery upgrade and a different thing that hasn’t changed.
According to a digital chat station, the phone getting a 100-plus mAh capacity inside a similar shell represents a real improvement for users who already found the Pro Max to be enough. If that claim pales in comparison to the original thick argument that supports it, the picture changes. The device, which matches its predecessor in thickness, display size and weight, is a maintenance release from a hardware standpoint, without a confirmed capacity increase. Camera, modem and dynamic island changes will still be important to buyers upgrading from older models, but anyone on the iPhone 17 Pro Max will have limited hardware reasons to make the move.
A weight rumor complicates matters further. A device that weighs more than 240 grams, after the iPhone 14 Pro Max, after reliable reviews, combined with a 100 mAh battery increase, the heavier iPhone raises a reasonable question: where does the extra weight come from? Current rumors do not answer that, and no evidence in the available data provides an explanation.
Where are the open questions now?
The thickness number that has dominated iPhone 18 Pro Max coverage for the past three months has been retracted by the person who set it, with no explanation given. The new 8.75mm figure deserves the same skepticism as the 8.8mm replacement.
A battery rating of 5,100–5,200 mAh and a weight claim of over 240 grams, according to reliable reviews, are still unknown. They are stable through several rounds of revisions from other sources, which lack any sign of reliability or updated information.
Signals to look out for: regulatory filings confirming actual battery capacity, fake unit measurements from case manufacturers as the launch window nears, and independent confirmation of battery and weight figures from sources other than Ice Universe. The iPhone 18 Pro Max and iPhone 18 Pro are expected to be released later this year as part of Apple’s annual refresh. Until more concrete data comes in, the honest reading is that the phone will not change where you’re looking, with changes below the surface still to be confirmed.
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