Since Sony Mobile is not using the magnetic connector in its Xperia flagships anymore, it negates the need for Sony to release new charging docks per model. Instead, we have the Micro USB Charging Dock DK52 which is a vanilla dock, offering a simple charging function only.
It was initially launched for the Xperia Z3+, but will also work with the Xperia C5 Ultra and M5. Sony is also promoting the dock for the upcoming Xperia Z5 series, so if you want an easy-ish way to charge your phone then you may want to pick one of these up along the way.