https://wccftech.com/iphones-2018-in-house-power-chips/

Making its own processor, chipset and graphics processor was not sufficient because a new report states that Apple will be designing its own power management chips. Another interesting revelation is that these chips could be found in the 2018 iPhone lineup, showing that Apple seems to be moving with ferocity.

With the new plan reportedly set in motion, Nikkei states that Apple will be cutting dependence on Dialog Semiconductor, but only a partial number of 2018 iPhone units are going to be outfitted with the custom in-house power management chip. So what exactly does this chip do?