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iPhone 17 Pro Max Rumored to Pack Record 5,000 mAh Battery

In exchange for a slightly bulkier chassis, the new model could house Apple’s largest-ever power cell as runtime relies on software refinements alongside chipset efficiency.

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Get ready for a beefy battery.
iPhone 16 Pro Max is the company's current flagship smartphone
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Overview

  • Leaked by Weibo tipster Instant Digital in early July, the iPhone 17 Pro Max is expected to feature a battery around 5,000 mAh, marking the largest capacity ever in an iPhone.
  • That cell would represent nearly a 10 percent increase over the 4,676 mAh pack in the iPhone 16 Pro Max, continuing the Pro Max line’s incremental growth.
  • Reports indicate Apple may thicken and slightly weighten the chassis to fit the larger battery, signaling a design trade-off for extended endurance.
  • Projected gains in actual battery life hinge on iOS 26 power-management features and efficiency improvements in the upcoming A19 Pro chip.
  • Additional leaks suggest a vapor chamber cooling system will replace graphite sheets to better manage heat from the larger battery and higher-performance internals.