iPhone 17 Air to be slimmest yet at 5.5mm, but with a smaller battery, priced at $899.

The upcoming iPhone 17 Air is expected to be Apple's thinnest phone at 5.5mm, with a 2,800mAh battery, potentially leading to shorter battery life. Apple may compensate by using high-density battery technology or AI to optimize power usage. The phone is rumored to have a 6.6-inch 120Hz display and be powered by the A19 chip. The iPhone 17 series, launching in September, includes four models with various camera upgrades, starting at $899 in the U.S.