The official technical specifications of Apple's upcoming flagship smartphones have come into sharp focus following concrete regulatory filings surfaced from China's 3C database.
Spotted initially by prominent industrial tipster Digital Chat Station, the verified listings outline the raw battery capacities for the highly anticipated iPhone 18 Pro and iPhone 18 Pro Max.
The hard figures correct earlier supply chain rumors, painting a detailed picture of notable structural power upgrades across different global hardware variants.
The fresh documentation highlights a continuing engineering trend: Apple is leveraging the internal space savings of eSIM-only hardware structures to pack in physically larger battery cells.
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While the United States market routinely receives eSIM-exclusive iPhone builds, international regions—including mainland China—continue to feature a dedicated physical SIM tray mechanism.
This structural distinction directly affects internal component volume allocation, resulting in distinct battery capacity profiles across identical models.
iPhone 18 Pro Series Battery Sizes
| Model Variant | Capacity (3C Database) |
|---|---|
| iPhone 18 Pro Max eSIM | 5,567 mAh |
| iPhone 18 Pro Max Physical | 5,391 mAh |
| iPhone 18 Pro eSIM | 4,288 mAh |
| iPhone 18 Pro Physical | 4,056 mAh |
If these official 3C database figures prove accurate, the eSIM-only variant of the iPhone 18 Pro Max will mark an impressive 479 mAh volumetric capacity leap over its previous-generation counterpart. Meanwhile, consumers purchasing the physical SIM variant of the Pro Max will enjoy a 500 mAh plus capacity injection.
The baseline Pro line is receiving more conservative but still steady updates; the eSIM model climbs to a 4,288 mAh ceiling, while its physical SIM tray equivalent lands at 4,056 mAh, providing a reliable multi-hour efficiency runway for mobile power users.
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