iPhone 18 Pro and Pro Max Battery Sizes Confirmed!
China's 3C certification database lists exact battery capacities for the upcoming iPhone 18 Pro and iPhone 18 Pro Max models.
The filings show the iPhone 18 Pro carries a 4,056 mAh battery in the China version with a physical SIM slot. The US eSIM-only version gets 4,288 mAh. Those numbers mark a modest rise from the iPhone 17 Pro, which had 3,988 mAh for China and 4,252 mAh for the US.
The iPhone 18 Pro Max sees a larger gain. Certification lists 5,391 mAh for the China version and 5,567 mAh for the US version. The previous iPhone 17 Pro Max came with 4,823 mAh and 5,088 mAh in those respective markets. The Pro Max jump adds roughly 500 mAh in the US model.
Digital Chat Station shared screenshots from the 3C database on Weibo that match these figures. The leak from the tipster lines up with the official filings that surfaced today. Apple files these documents as part of the regulatory process for devices sold in China.
The difference between SIM and eSIM versions continues a pattern Apple followed with the iPhone 17 series. Markets that use physical SIM cards get one battery size while the US gets another to account for the lack of a SIM tray. Apple does not publish exact mAh ratings itself and instead lists estimated usage times on its product pages.
Industry observers note that Chinese brands often ship phones with batteries over 7,000 mAh. Apple has relied more on processor efficiency gains to deliver strong battery life. The iPhone 18 Pro models pair these new cells with the expected A20 Pro chip built on a 2nm process. That combination could deliver better endurance even with the modest capacity increase on the standard Pro.
The Pro Max capacity growth stands out as one of the bigger year-over-year changes for the lineup. The 6.9-inch model already leads in battery performance among iPhones. This upgrade positions it to extend that advantage when the phones reach stores.
Apple keeps the rest of the design changes limited based on current leaks. The Pro and Pro Max keep the same 6.3-inch and 6.9-inch screen sizes. Camera work includes reports of three 48MP sensors and a possible variable aperture on the main lens. The Dynamic Island cutout may shrink as some Face ID parts move under the display.
3C certification covers safety and charging standards for devices entering the Chinese market. These early filings give a clear look at the power cells months ahead of the expected September launch. Teardowns after release will confirm the final installed capacities.
Supply chain sources and regulatory records like these have proven accurate for past iPhone battery details. The numbers reported today align closely with earlier leaks from the same Weibo tipster. Apple has not commented on the certification details. More specifications will surface as the company moves closer to announcement.
