MacRumors claims new photos allegedly of the iPhone 5S show a tweaked rear shell and the phone's internals.
Note that alleged iPhone 5S rear shell images have appeared as far back as December of last year.
The iPhone 5S -- a device that's widely rumored and expected, though Apple has said zilch about such a product -- is also expected to boast a higher-resolution camera. Earlier reports have indicated that it may sport a 12-megapixel (or possibly 13-megapixel) camera with improved low-light mode.
MacRumors also posted purported photos of the main logic board -- matching previous leaked images -- showing a new layout for components.
The battery is also a departure from the iPhone 5, MacRumors claims.
"The battery carries a more recent Apple Part Number of 616-0652 compared to the iPhone 5 battery...[and] has a higher capacity of 5.92 Whr, compared to the 5.45 Whr capacity of the iPhone 5's battery."
Apple is expected to launch the iPhone 5S later this year. New lower-priced iPhones offered in a variety of colors may also launch at the same time, reportedly in September.