The iPhone 18 Pro Max has been appearing in leaks for some time. Earlier reports suggested that the smartphone would have under-display Face ID and camera upgrades. Now, the apparent battery capacities of both the eSIM and non-eSIM models have surfaced online.
Reliable Weibo leaker Digital Chat Station has leaked the iPhone 18 Pro Max’s battery capacity, which appears to be slightly larger than that of the current iPhone 17 Pro Max.
iPhone 18 Pro Max’s leaked battery capacity indicates higher battery life

According to Digital Chat Station, the iPhone 18 Pro Max will once again be available in two models: eSIM and non-eSIM. The eSIM version reportedly does not include a physical SIM slot, allowing Apple to fit a larger battery, similar to the current iPhone 17 Pro Max. The non-eSIM model apparently retains a physical SIM slot, which reduces the available space for the battery.
The Weibo leaker stated that the upcoming iPhone 18 Pro Max’s eSIM and non-eSIM models will feature the following battery capacities (translated via Google):
“According to information from the supply chain, the battery capacity of the Chinese version of the iPhone 18 Pro Max will also reach approximately 5000mAh, while the international version’s prototype has a maximum capacity of 5100-5200mAh. Combined with the 2nm A20 Pro chip, the battery life might be something to look forward to.”
The Chinese version of the iPhone 18 Pro Max is reportedly the one with a physical SIM slot, so it will have a smaller 5000mAh± battery. The international eSIM model is expected to feature the larger 5100–5200mAh± battery.
Compared to the iPhone 17 Pro Max, the iPhone 18 Pro Max non-eSIM model offers a 3.67% increase in battery capacity, while the eSIM model sees a 2.2% increase. Now, this small jump in battery capacity may seem small, but combined with the upcoming A20 Pro chip, it should translate into a significant improvement in battery life.
The Apple A20 and A20 Pro chips reportedly utilize TSMC’s 2nm manufacturing process, which should make them far more efficient. This means they will likely consume less power and improve battery performance anyway.
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Edited by Rachel Syiemlieh