Performance & Battery Life
The Qualcomm Snapdragon 810 processor with four Cortex-A53 cores running a 1.5 GHz clock and four Cortex-A57 cores running a 2 GHz clock powers the Xperia Z5 Premium. The device also has an Adreno 430 GPU, 3 GB of RAM, and 32 GB of internal storage. These specs are exactly the same as the standard Z5, although that phone doesn’t have to handle a 4K display.
In reality, there is no difference in performance here. Sony has harmonized background software processes with the hardware platform in an optimal way, and the Xperia Z5 Premium acts exactly the same in everyday work as the Xperia Z5. It also secures almost identical figures on synthetic benchmarks. Users should have no problem with the performance as the phone runs fluidly and quickly.
The same can be said for the battery. Running a 4K display requires more power and thankfully the Premium comes with a 3420 mAh battery, compared to the Z5’s 2900 mAh battery. The battery offers above average run times and is equal to an average phablet. With normal usage the Xperia Z5 Premium’s battery needs to be recharged every other night.
Software & Camera
Software and the cameras – front and rear – are identical for the three Xperia Z5 phones.
In short, Xperia UI is a slightly modified user interface compared to pure Android OS 5.1.1 (Lollipop), while the back-facing 23-megapixel camera is one of the best available on mobile devices and offers the option of recording 4K videos with 30 fps. Even without the 4K display the Sony Xperia Z5 Premium is a solid phone for those who simply want a big phone with a very good camera.