Apple plans to launch its slimmest iPhone ever, the iPhone 17 Air. However, the design choice may come with a major compromise—battery size. Reports from Weibo suggest the device will use a 2,800 mAh battery. For comparison, the iPhone 16 series ranged from 3,561 mAh to 4,685 mAh.
The smaller battery is due to the Air’s ultra-thin design, rumored to measure just 5.5 mm. While this sleek look enhances portability, it raises questions about battery endurance for everyday use.

iOS 26 to Boost Power Efficiency
To manage the smaller battery, Apple will lean on iOS 26’s Adaptive Power Mode. This feature adjusts energy use dynamically to extend battery life.
Internal testing shows mixed results. Apple says most users should see “full-day” performance, but reports claim only 60% to 70% achieve that. Current iPhones hit 80% to 90% in similar tests.
Battery Accessories Could Return
Apple might bring back battery accessories to address this gap. The company could reintroduce the battery case or a new MagSafe pack. These options would appeal to heavy users who want extra power without compromising the phone’s thin profile.
Launch and Market Positioning
The iPhone 17 Air will launch in September 2025 alongside the standard and Pro models. It will sit between them in pricing and features, sharing some Pro internals but focusing on ultra-thin aesthetics.
While software improvements promise better efficiency, users who rely on heavy gaming, navigation, or photography may need accessories—or wait for real-world reviews before upgrading.