The Samsung S25 Edge is one of the thinnest flagship models in recent years, with a body thickness of only 7.1mm and a 3900mAh battery. Although the battery capacity of Android mid-range models has generally exceeded 6000mAh in 2025, 3900mAh is still a “passing line” among ultra-thin models in its class. In comparison, the leaked information of the iPhone 17 Air shows that its body will be compressed to 5.5mm (a record for iPhone), but the battery capacity may be as low as 2800mAh, which is not even as good as Samsung’s original Z Flip folding screen phone (3300mAh) released in 2020.
The leak also revealed that Apple may use a new generation of high-density battery technology for the iPhone 17 Air, which is expected to increase the battery capacity by 15%-20% by optimizing materials and structure. If true, its actual capacity may reach 3220mAh-3360mAh, but it is still lower than the Samsung S25 Edge, and it needs to rely on laboratory data to verify.
Industry analysts pointed out that the contradiction between the ultra-thin body and the battery capacity is essentially a technical trade-off: Apple’s pursuit of extreme thinness and light will inevitably sacrifice part of the battery life. Whether consumers are willing to pay for the ultra-thin and light 5.5mm depends on whether its system optimization can make up for the hardware shortcomings.
Despite the criticism of the battery capacity, the iPhone 17 Air has other highlights: it weighs only 145 grams, making it one of the lightest flagship models in 2025; Equipped with a 6.6-inch Dynamic Island display, all models come standard with a 120Hz ProMotion high refresh rate. Equipped with A19 chip and WiFi 7, the performance and network connection capabilities have been upgraded. It is strengthened by super ceramic crystal glass, and the drop resistance is improved; The starting price is lower than the iPhone 17 Pro ($999) and is positioned in the mid-to-high-end segment.
The iPhone 17 series, including the Air, Pro, and Pro Max, is expected to be released in September. Previously, Apple suffered bad reviews for the poor battery performance of the iPhone 16 series, and the battery strategy of the iPhone 17 Air may cause further controversy. According to data from market research institutions, in 2025, consumers’ attention to smartphone battery life has surpassed photography and performance, becoming the primary demand.
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