Regulatory filings in China have revealed some interesting details about Apple's latest iPhones, including that the iPhone XS and XS Max both use 4GB of memory, and while the iPhone XS Max and XR have larger batteries than the iPhone X, the iPhone XS a power source with a smaller capacity.
Submission to the Chinese Ministry of Industry and Information Technology (TENAA) found by MyDrivers reveal that the iPhone XS has a 2.658 mAh battery, smaller than the 2716mAh battery of its predecessor, the iPhone X. The small capacity reduction is unusual, since the iPhone XS and iPhone X have the same format.
Despite the discount, it is claimed that the iPhone XS offers a longer battery life, while Apple claims that the device can be used 30 minutes longer than the iPhone X.
The larger iPhone XS Max has a larger battery that fits the size, with a capacity of 3.174 mAh. Although it suffers from controlling a larger screen, it also offers more usage time besides the iPhone X, with an hour and a half according to Apple.
The iPhone XR, which is supposed to have the best claimed battery life at 1.5 hours longer than the iPhone 8 Plus, manages to do this with a smaller battery than the iPhone XS Max. According to the submission, the iPhone XR has a battery capacity of 2,942 mAh, between the iPhone XS and the iPhone XS Max.
The most likely explanation for the long battery life claim is the use of an LCD screen by the iPhone XR instead of the OLED version used in the XS models. The smaller screen size of 6.1 inches compared to the 6.5-inch XS Max also helps to reduce power consumption.
A second item in the archives is that both the iPhone XS and the iPhone XS Max each use 4 gigabytes of memory. The iPhone XR is known as equipped with 3 GB of RAM.
The iPhone XS and XS Max RAM was previously rumored in alleged benchmarks of the 2018 iPhone series, including a Geekbench score shortly after Apple's September event, as well as a supposed benchmark in July.
The RAM values for the XS models are higher than with previous iPhone releases. The iPhone X and iPhone 8 Plus last year each had 3 gigabytes of memory, while the iPhone 8 had 2 gigabyte.