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.