Overview

• Instant Digital’s Weibo leak indicates the iPhone 17 Air’s battery capacity will hover around 2,800 mAh, placing it below the 3,000 mAh mark.
• The device’s ultra-thin 5.5 mm design limits internal space and directly contributes to its reduced battery cell size.
• Apple’s internal testing reportedly showed that only 60–70% of iPhone 17 Air users achieve a full day of use on a single charge, compared with 80–90% on other models.
• iOS 26 will introduce an Adaptive Power Mode designed to make small performance adjustments that extend the Air’s runtime despite its smaller battery.
• A dedicated battery case is expected to be offered as an optional accessory to provide additional power for users with heavier usage needs.