The new Apple iPhone XR at an Apple Inc product launch in Cupertino
Philip W. Schiller, Senior Vice President, Worldwide Marketing of Apple, speaks about the new Apple iPhone XR at an Apple Inc product launch event at the Steve Jobs Theater in Cupertino, California, U.S., September 12, 2018. REUTERS/Stephen Lam (Photo: STEPHEN LAM | Reuters)

We're a few months away from the announcement of Apple's 2019 iPhone lineup, including the iPhone 11 and iPhone 11 Max. in 2019, Apple is expected to introduce three new iPhone models, including successors to the iPhone XS and iPhone XS Max, and a refreshed iPhone XR. 

While few are likely too excited about another LCD-equipped iPhone, Apple's flagship duo is shaping up nicely; they're expected to be the first iPhones to boast triple camera systems, the first to offer USB-C and the first to ship with iOS 13, which will bring a system-wide dark mode, privacy enhancements and a performance boost. 

So far, leaks for Apple's 2019 iPhone lineup focus on the gadgets' design. Apple's always given design on the iPhones a priority similar to hardware specifications, but as the industry continues to mature, the Cupertino tech giant is running out of options to maintain the iPhone's brand value. Today we've got a rare leak for the specifications of two of the three iPhones that Apple is rumored to launch later this year, presumably in September. 

Looking at the battery first, Today a leak claims an upgrade in the 2019 iPhone lineup's battery size. Apple was one of the first companies in the industry to introduce a dual-battery on a smartphone, with the iPhone X. Since then, only the iPhone X's successors have kept this unique design, and only the iPhone XS has a single battery cell. Its larger co-variant has two separate battery packs arranged in an 'L' configuration. 

Today's report suggests that the 2019 iPhone XR will have a 3110mAh battery, while the iPhone 11 Max will come packing a 3650mAh cell. For reference, the 2018 iPhone XR has a 2942mAh pack, which the iPhone XS Max has a 3174mAh cell. Larger batteries when combined with 7nm+ processors will allow users to eke out higher performance from their new smartphones for a longer time period than they can with last year's smartphones. 

Another minor change is that the mute switch, side button, and volume buttons are expected to shift slightly. This is likely due to space constraints caused by the new camera technology. The mute switch is also rumored to have a slightly different shape and be oriented up and down rather than right to left. 

While we've been referring to the devices as the iPhone 11 and iPhone 11 Max, it's possible that Apple will stick with the Roman numerals styling, branding the devices as the iPhone XI and iPhone XI Max.