Nearly a year ago Samsung SDI began producing 5th generation batteries for electric vehicles through a stacking method instead of the usual ‘jelly roll’ method. This way the battery components can be stacked together tighter. This results in a higher capacity for the same volume.

Now as per The Elec, Samsung is prepping to use this method for smartphone batteries as well. Batteries produced using the stacking method have 10% higher capacities than the traditional roll design.

What this means is that a 5,000mAh battery similar to the Galaxy S22 Ultra could have a capacity of 5,500mAh capacity. Phones can alternatively be made thinner and lighter while retaining the battery capacity.

Flat roll batteries cannot be packed tightly as the natural swelling that occurs when the battery is charged and discharged can bend the electrodes and damage them. The stacked design solves this issue and makes use of the dead space inside the battery to be filled in.

The new batteries will be produced at the Cheonan plant in Korea, the company is expected to convert one of the lines at the Tianjin plant in China to use this new method.

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