iPhone 18 Pro battery leak 4288mAh

Cult of Mac and Notebookcheck reported on June 2 that a fresh leak points to Apple’s iPhone 18 Pro using battery capacities close to current-generation levels rather than adopting silicon-carbon cells in 2026. Cult of Mac said the leak suggests Apple may “skip” that battery chemistry again, while Notebookcheck published model-specific capacity figures for different SIM configurations. (cultofmac.com) Apple has not announced the iPhone 18 Pro or disclosed any battery specifications for it. (notebookcheck.net) Apple’s current iPhone technical-spec pages list battery life claims, but not mAh capacities, for shipping models. (apple.com) ### What exactly did the leak say about battery size? Notebookcheck reported that the iPhone 18 Pro is tipped to carry a 4,056 mAh battery in versions with a physical SIM tray and a 4,288 mAh battery in eSIM variants. The report said that would create a 232 mAh gap between the two versions of the same phone. Cult of Mac, citing the same leak, said those numbers imply Apple is staying near the battery sizes already seen in its recent Pro models instead of making a larger jump through new cell chemistry. The publication framed the leak as another sign that a more substantial battery upgrade may not arrive with the 2026 Pro handset. (cultofmac.com) ### Why are eSIM and physical-SIM models being discussed separately? Notebookcheck said the larger 4,288 mAh pack would be tied to eSIM variants, which could matter beyond the United States if Apple expands eSIM-only sales to more markets. (notebookcheck.net) The report said that could give some non-U.S. buyers access to the larger battery for the first time. Apple already sells some iPhone models in different SIM configurations by market, though the company has not said how it plans to configure the iPhone 18 line. Because Apple has not announced the device, the leak remains unconfirmed. (cultofmac.com) ### What is the silicon-carbon part of this story? Cult of Mac said the leak suggests Apple may again forgo silicon-carbon battery technology, which has been discussed in the smartphone industry as a way to raise energy density without making batteries much larger. The report did not cite Apple, and Apple has not publicly said it plans to use silicon-carbon cells in any iPhone. (notebookcheck.net) Notebookcheck’s reporting focused on the leaked capacities rather than any official materials from Apple. That means the battery chemistry point, like the capacity figures themselves, is based on supply-chain or leaker information rather than company confirmation. (apple.com) ### How much should readers rely on this now? Apple’s official iPhone 17 Pro and iPhone 16 Pro specification pages do not publish battery capacities in mAh, limiting direct official comparison with the leaked numbers. Apple instead lists battery-life estimates and other hardware details for current devices. (cultofmac.com) Notebookcheck and Cult of Mac both presented the information as a leak, not a product announcement. Until Apple unveils the iPhone 18 Pro, the reported 4,056 mAh and 4,288 mAh figures should be treated as provisional. ### What comes next for this rumor? (notebookcheck.net) Apple has not set out public iPhone 18 Pro specifications, pricing or regional SIM plans. The next concrete step will be Apple’s eventual iPhone 18 launch materials, where the company typically publishes official technical specifications and battery-life claims for each model. (apple.com)