Samsung's SDI division, responsible for developing and producing Li-ion batteries, is planning to use technology that increases capacitance (already used in electric vehicle batteries) in phone and tablet batteries. Specifically, the "stacking" method is a way of packing battery components such as electrodes and electrolytes more tightly to increase energy density.

According to the Korean newspaper THE ELEC, stacking positive and negative electrodes will increase the battery capacity of the Samsung Galaxy phone. They hope to see this technology in the Galaxy S24 series.

The Galaxy S23 Ultra is equipped with a 5,000 mAh battery. Thanks to this technology, Samsung could increase the Galaxy S24 Ultra's battery capacity by an additional 10% without requiring additional interior space.

If this is the case, the Galaxy S24 Ultra could become the high-end phone with the longest battery life. After all, the Galaxy S23 Ultra already had a screen-on time of up to 19 hours in PhoneArena's testing. If it can last an additional two hours, the Galaxy S24 Ultra will beat the iPhone 14 Pro Max to take the top spot.

By using the stacking method for all battery types, Samsung SDI will be able to better compete with local rival LG Energy (which also has similar technology) as well as Chinese firms ATL and BYD.