iPhone 17 Air Leak Reveals Ultra-Thin Design, High-Density Battery, and More

According to a new leak from Naver user yeux1122, Apple’s upcoming iPhone 17 Air may be the company’s thinnest and lightest iPhone yet. The device is rumored to measure just 5.5mm thick, closely aligning with predictions from analyst Ming-Chi Kuo and leaked dummy unit videos showing thickness as low as 5.65mm.

If true, this would make the iPhone 17 Air even thinner than the iPod touch and thinner than any modern flagship phone on the market.

Lightweight, With a Big Display

The leak also claims the iPhone 17 Air will weigh around 145 grams, despite reportedly featuring a larger 6.6-inch display. That lightweight build will likely be helped by the use of a titanium frame, a material Apple first introduced in the iPhone 15 Pro lineup.

2800 mAh Battery — But with a Twist

One concern about ultra-thin phones is battery life, but Apple may have a solution. The iPhone 17 Air is said to feature a 2800 mAh battery, which on its own sounds modest. However, yeux1122 reports the battery may utilize high-density silicon-anode cells — a major innovation in battery technology.

These advanced cells, reportedly being ramped up for production by TDK Corp., could increase effective capacity by 15–20% without increasing size. This would bring the iPhone 17 Air’s real-world performance closer to a 3200–3400 mAh battery, helping to offset the physical limitations of such a thin design.

A Dedicated Battery Case May Be in the Works

To further address potential battery concerns, Apple is said to be developing a dedicated battery case for the iPhone 17 Air — a first since its MagSafe Battery Pack. This accessory would give users the option for extended power without compromising the device’s slim profile.

A Look at the Full iPhone 17 Lineup

The iPhone 17 Air is expected to debut alongside the rest of the iPhone 17 family in September 2025. Here's what the full lineup is rumored to include:

• iPhone 17: 6.1-inch display, A18 chip, 12GB RAM, 24MP front camera, dual 48MP rear cameras

• iPhone 17 Air: 6.6-inch display, A19 chip, 12GB RAM, ultra-thin design (~5.5mm), 48MP single rear camera, titanium frame, possible Apple-designed modem

• iPhone 17 Pro: 6.3-inch display, A19 Pro chip, triple 48MP cameras with periscope lens, vapor chamber cooling, new aluminum/glass design, potential 8K video recording, rumored Sky Blue color

• iPhone 17 Pro Max / Ultra: 6.9-inch display, same features as Pro with larger size and a smaller Dynamic Island

Final Thoughts

If these leaks are accurate, the iPhone 17 Air could be one of Apple’s most radical redesigns yet — echoing the leap made with the iPhone X. With high-density battery tech, a bold ultra-thin build, and top-tier specs, it seems Apple is setting the stage for a new design era that blends performance, elegance, and portability like never before.