https://wccftech.com/tenaa-filings-iphone-11-pro-max-battery-ram-specs/

Unlike most other smartphone vendors, Apple doesn’t reveal some specifications during its iPhone keynote ranging from the battery capacity and RAM. This year, things weren’t any different but that hasn’t prevented third-party dismantlers, leaksters, and foreign regulatory authorities to provide those missing details. Lucky for the users who want to know these details ahead of the phone’s release in other regions, the Chinese authority TENAA has now listed these specifications, and they are very interesting.

According to Apple, the newer iPhones last anywhere between one and five hours longer than last year models, depending on the model you go for, but of course, that’s not the same as knowing the actual battery capacities. According to TENAA, the iPhone 11 has a 3110mAh battery, which is only a tad bit larger than iPhone XR’s 2942mAh battery. The iPhone 11 Pro packs in a 3046mAh cell, which is quite an improvement over the iPhone XS’ 2658mAh Cell. Lastly, compared to the 3174mAh capacity of last year’s iPhone XS Max, the iPhone 11 Pro Max sports a much heftier 3969mAh battery under the hood.