Smartphone batteries may be getting ready for a new leap in capacity. According to flippant remarks from leaker Digital Chat Station, some Chinese manufacturers are trying Battery with rigid steel case Combined with stacked unit structure.
The goal is to achieve a capacity of 9,000 to 10,000 mAh on future high-end smartphones. However, this is still a technology in its testing phase, and there is no clear indication of when the first commercial devices will be available.
Stacking steel and batteries to increase energy density
The switch from a traditional soft shell to a rigid structure allows for better utilization of internal space and reduces the tolerances required to control cell swelling. The metal casing also promotes passive cooling. Steel adds rigidity and allows for thinner structures, although it adds weight.
In contrast, stacked cell technology involves the internal arrangement of the cell’s layers. The anode and cathode are stacked together rather than wrapped in a traditional “jelly roll” structure. Sources revealed that the solution could reduce internal resistance and increase energy density.
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Insiders’ reference isiPhone 18 Pro MaxIt is reported that its nominal capacity is 5,391mAh, and its typical capacity is close to 5,500mAh. A large Chinese manufacturer is reportedly evaluating a similar architecture and combining it with stacked cells.
The Chinese manufacturer has exceeded 6,000 mAh capacity, mainly thanks to silicon carbon anodes. For example, Xiaomi launched the Mi 18 Pro Max in China with an 8,500 mAh battery. So getting to 10,000 mAh on the most advanced models requires going a step further in terms of managing internal space.
Such a large battery translates to multiple days of battery life, but It will also increase the difficulty of design. Weight, cooling, and battery space should be balanced with cameras, displays, and other components. In addition, it is unclear which Chinese manufacturer is conducting the test: Digital Chat Station hinted that it might be Xiaomi, but the information has not been confirmed.
