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iPhone 18 Pro Max’s Huge Battery Size Reportedly Leaked

The eSIM-only model could top 5,400 mAh, while the physical-SIM version is said to use a smaller cell than last year’s phone.

  • Macworld reported that the upcoming iPhone 18 Pro Max may feature a 5,425 mAh battery for eSIM-only models, while the physical SIM version reportedly packs a 5,235 mAh cell.
  • These specifications represent a notable increase from the iPhone 17 Pro Max, which houses a 5,088 mAh battery for eSIM models and a 4,823 mAh cell for physical SIM variants.
  • Both versions of the new device would exceed the 5,000 mAh battery found in the Samsung Galaxy S26 Ultra, positioning Apple ahead of current flagship competitors.
  • The information from Weibo remains unverified, as the report relies on questionable sourcing traced to hard-to-verify social media posts rather than official company confirmation.
  • Apple has historically relied on tight hardware and software optimization rather than raw capacity numbers to deliver strong battery endurance, making these reported increases a notable strategic shift.
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gsmarena.com broke the news on Thursday, July 2, 2026.
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