The highly anticipated iPhone 17 series is on the verge of its official launch, and intriguing details regarding its battery capacity have recently come to light. Notably, the battery capacity of the US-version iPhone 17 Pro Max has made a leap, reaching 5088mAh and surpassing the 5000mAh threshold for the first time. This boost in capacity is expected to translate into an impressive battery life exceeding 35 hours. In stark contrast, its Chinese domestic counterpart pales in comparison, with a capacity of merely 4823mAh, marking a 265mAh deficit.

The disparity extends to other models as well. The US-version iPhone 17 Pro boasts a battery capacity of 4252mAh, whereas the Chinese domestic version falls short at 3988mAh, a difference of 264mAh. The standard iPhone 17 model features a battery capacity of 3692mAh. Meanwhile, the iPhone 17 Air maintains a uniform battery capacity of 3149mAh across both markets.

The root cause of this battery capacity divergence lies in the technological approach adopted by the US version. Specifically, the US version incorporates eSIM technology, which eliminates the need for a physical SIM card slot. This innovation not only streamlines the device's design but also frees up valuable internal space, enabling a larger battery capacity.