iPhone 18 Pro Max Battery Leak Points to a Major Upgrade: 5,567mAh Capacity RumoredThe anticipated iPhone 18 Pro Max is rumored to come with a substantial boost in battery capacity, reportedly reaching 5,567mAh and 5,391mAh for various models. This upgrade marks a significant enhancement over its predecessor, the iPhone 17 Pro Max. Notably, eSIM-exclusive versions might host larger batteries, optimizing internal space, all aimed to enhance performance while preserving competitive battery longevity.Apple's iPhone 18 Pro Max might be lining up for one of the company's biggest year over year battery capacity jumps in recent flagship history. The latest leaks point to a 5,567mAh battery for the eSIM only version, and a 5,391mAh cell for the physical SIM model.These figures reportedly trace back to Chinese regulatory certification info, and a more recent alleged battery photo has also surfaced showing that same 5,391mAh capacity for the physical SIM version.About The AuthorHey there, i am a technology enthusiast with a deep passion for gadgets, consumer electronics, emerging technologies, and the fast-paced world of digital innovation. Constantly exploring the latest tech trends, product launches, and industry developments, I enjoy translating complex technological advancements into engaging and accessible stories for readers. My interests span smartphones, wearables, artificial intelligence, smart devices, and the broader technology ecosystem. As I begin my journey as a Tech Journalist at Gadgets Now, I am excited to contribute to a platform that informs millions of readers, combining my passion for technology with storytelling to deliver insightful, accurate, and timely tech coverage.This new leak comes following an previous which had suggested the lower capacities of 5,425mAh and 5,235mAh respectively.Apple has not confirmed any of these figures which means, as before, all must be viewed as speculation for the time being, however this regulatory data along with the image leak all point to a solid increase in battery capacity for the iPhone 18 Pro Max over the previous generation iPhone 17 Pro Max.How big could the iPhone 18 Pro Max battery be?The latest leak points to two different battery sizes depending on the model:5,567mAh for the reported eSIM only/US version5,391mAh for the reported physical SIM/China versionFor comparison, the iPhone 17 Pro Max has reportedly used batteries around 5,088mAh and 4,823mAh, depending on which regional configuration you're looking at.If these latest iPhone 18 Pro Max numbers hold up, the increases here would be genuinely significant.That reported 5,567mAh eSIM battery would be roughly 479mAh bigger, working out to around a 9.4% increase over the reported 5,088mAh iPhone 17 Pro Max battery.More articles by AuthorTrending StoriesThe reported 5,391mAh physical SIM battery would be about 568mAh bigger, translating to roughly an 11.8% jump over the reported 4,823mAh capacity.That would make this battery upgrade considerably bigger than what the earlier 5,425mAh and 5,235mAh leak had originally suggested.Why could the eSIM-only model have a larger battery?The gap between these rumored battery capacities really seems to come down to internal space.An iPhone without a physical SIM tray doesn't need to reserve room for that tray and all its associated components. Apple can potentially use that freed up space for a bigger battery, or other hardware entirely.A similar gap actually showed up with the iPhone 17 Pro Max too, where eSIM only models ended up with a bigger battery compared to versions running physical SIM hardware.That same pattern looks like it's continuing with the iPhone 18 Pro Max. If these latest figures check out, the eSIM only model could carry a battery roughly 176mAh bigger than the physical SIM version.Apple hasn't confirmed exactly how that freed up internal space actually gets used though, so it's more accurate to say that dropping the physical SIM tray simply opens up room for more battery capacity, rather than claiming all that space automatically converts into battery size.iPhone 18 Pro Max battery rumors so farDigital Chat Station allegedly leaked earlier in 2026 that the Chinese model could have a capacity around 5000mAh but global versions maybe between 5100mAh - 5200mAh.It was then increased to 5235mAh for physical SIM variant and 5425mAh for eSIM only variant in the later leak from Fire Universe. More recent regulatory info then pointed to noticeably higher figures, 5,391mAh and 5,567mAh.That latest alleged battery photo showing 5,391mAh adds another piece of evidence backing up this newer number, though its authenticity and the final retail configuration both remain unconfirmed for now.Expected iPhone 18 Pro Max specificationsSpecificationExpected iPhone 18 Pro MaxDisplayAround 6.9 inch LTPO OLED, 120HzProcessorA20 Pro, reportedly based on TSMC's 2nm processBattery5,567mAh eSIM only / 5,391mAh physical SIM, leakedRAM12GB rumoredRear camerasTriple 48MP system, rumoredMain cameraVariable aperture rumoredFront camera24MP rumoredModemApple C2, rumoredSoftwareiOS 27 expectedChargingFaster wired charging, potentially around 45W, rumoredDesignSmaller Dynamic Island rumoredLaunchSeptember 2026 expectedThese specs remain unconfirmed and could still shift before Apple's actual launch.What other upgrades could the iPhone 18 Pro Max bring?The battery's really just one piece of what's expected in Apple's next Pro Max upgrade.The iPhone 18 Pro Max is widely expected to run an A20 Pro chip, reportedly built using TSMC's second generation 2nm class process. A newer manufacturing process like that could genuinely improve performance and power efficiency, though we won't actually know the real battery life impact until the hardware's out and tested for real.This phone's also rumored to come with 12GB of RAM, which could help with increasingly demanding on device AI tasks and heavier multitasking.On the camera side, reports point to a triple 48MP rear camera system, potentially paired with a variable aperture main camera. The front camera's also rumored to bump up to 24MP, though that's still unconfirmed at this point.Another expected upgrade is Apple's C2 modem, which could improve cellular performance and efficiency compared to previous generations.Apple's also rumored to be working on a smaller Dynamic Island through changes to how the Face ID system's built. That said, reports on exactly how much smaller Apple's actually shrinking it remain a bit inconsistent right now.Could the bigger battery dramatically improve battery life?A bigger battery should give Apple more raw energy to work with, but it'd be a mistake to assume a 9% or 12% larger battery automatically translates into a similar jump in real world battery life.Battery endurance really depends on a lot more than just capacity alone. The display, processor, cellular modem, camera system, software optimization, network conditions, and background activity can all swing things significantly.That rumored A20 Pro chip could help by improving power efficiency, while the rumored C2 modem could potentially cut down on cellular power draw too. If both of these improvements actually materialize alongside the bigger battery, the combined effect could end up being a lot more meaningful than the capacity bump alone.The iPhone 17 Pro Max already showed genuinely strong endurance in independent testing. Tom's Guide recorded 17 hours and 54 minutes in its standardized battery test, though results can obviously vary quite a bit across different tests and real world usage patterns.For the iPhone 18 Pro Max then, the real question won't just be how big the battery is, it'll be how efficiently Apple can actually put that extra capacity to work.Why the battery upgrade mattersThis rumored increase could genuinely matter strategically for Apple's 2026 flagship.Apple's expected to introduce a faster processor, increasingly sophisticated AI features, upgraded camera hardware, and other improvements this generation. All of that stuff can potentially drive power consumption up.A bigger battery gives Apple more headroom to actually support all these components without necessarily sacrificing battery life to do it.It could also help Apple stay competitive against Android flagships, plenty of which already run batteries north of 5,000mAh. FAQsWhat is the expected battery capacity of the iPhone 18 Pro Max?The iPhone 18 Pro Max is expected to have a battery capacity of 5,567mAh for the eSIM only version and 5,391mAh for the physical SIM model.How does the battery capacity of the iPhone 18 Pro Max compare to the iPhone 17 Pro Max?The iPhone 18 Pro Max will see a significant increase, with the eSIM model offering about a 9.4% increase at 5,567mAh compared to the iPhone 17 Pro Max's 5,088mAh, and the physical SIM version offering an 11.8% increase at 5,391mAh versus 4,823mAh.Why does the eSIM-only model of the iPhone 18 Pro Max have a larger battery?The eSIM-only model has a larger battery because it does not need to reserve space for a physical SIM tray, allowing Apple to utilize that freed-up space for a bigger battery.end of article