The Moondrop MIAD 01 is one of the most distinctive Android devices of 2024 thus far. It has a 4.4mm headphone jack to go with the more conventional 3.5mm type. Furthermore, it seems it might be as appealing to teardown enthusiasts as well as audiophiles, and may, therefore, also be easier to repair than most modern smartphones.
But that space usually isn’t. No company would make a battery with a tiny little protrusion where the headphone jack once was. That’d cost a lot more, and make it a lot more fragile.
They’d be more likely to leave it empty, or fit something else in that space, like a third speaker.
By removing the headphone jack and saving space, everything can be laid out in a way that creates more room for a larger battery, many manufacturers do this.