Dan Pražák This year's iPhone 11 Pro Max has the largest battery (3 mAh) of all iPhones introduced so far. However, the upcoming models that Apple will introduce next year should improve even more in terms of battery capacity. The reason is according to a Korean website The Elec a significantly smaller and thinner circuit that controls charging and consumption.
A new type of battery control unit for the next iPhones will be supplied by the Korean company ITM Semiconductor. It recently managed to develop a new module that is almost 50% smaller than the unit in current iPhones, as it combines a field-effect transistor MOSFET and a PCB, thus eliminating the need for additional components. The new type of circuit is specifically 24 mm shorter and 0,8 mm lower. ITM Semiconductor also supplies the same component for Samsung and its upcoming Galaxy S11, which the South Korean company will introduce early next year.
The battery controller is an integral part of today's smartphones. It takes care of protecting the battery in several ways - above all, to prevent it from being overcharged or undercharged. It also controls what current and voltage will be fed to the battery during charging and monitors consumption, for example, when the processor is under higher load.
Using a smaller module from ITM Semiconductor frees up a significant amount of space inside the iPhone, where every millimeter is considered. Apple should reportedly use the space gained for a larger battery, and the iPhone 12 could thus offer even longer endurance. Even with this year's models, Apple engineers managed to significantly improve consumption, and thanks to this, the iPhone 11 Pro Max can last five hours more on a single charge than the previous iPhone XS Max.
Source: Macrumors
I'm already looking forward to how battery life will be the most important criterion in the world for forged iPhones. :)