As I suspected, 7 iPhone Plus it uses its hardware to its maximum capacity when we try to take pictures using the Portrait function available exclusively for it. Taking a series of pictures with this model today, I noticed that the iPhone 7 Plus heats up a lot, as much as when you play games or surf for a long time on the 4G Internet.
Those from Apple have clearly said that this function requires a lot of processing power and I think that then the quad-core processor works at its maximum capacity to display the bokeh effect for photos in real time. With the iPhone 6S Plus, the same thing does not happen when you record simple photos, but the iPhone 7 Plus does not heat up strongly if you record many photos, even HDR.
In the case of recording long 4K video clips, the iPhone 7 Plus heats up seriously, but in the case of pictures it should not have been the same situation, but with the portrait function things have changed. Even though the feature is now available in beta version, in the future it will not work differently in terms of processing power requirements.
iPhone 7 Plus heats up excessively while using the Portrait function
The serious heating of the iPhone 7 Plus during the use of the Portrait function also has the effect of a serious consumption of battery energy since the processor is working at maximum capacity. In this idea, you should not be surprised if after recording many pictures with the Portrait function you will also notice that the energy available in the battery is less than you would have imagined.
Those from Apple did not provide details of this kind before launching the Portrait function on the iPhone 7 Plus and it was normal not to do it because they have no reason to. Functions that require a lot of processing power generate high heat for terminals and high power consumption, so it was expected that this would happen.
In conclusion, when you use the Portrait function intensively, don't be alarmed if the iPhone 7 Plus heats up excessively or if you run out of battery power.
