We’ve recently seen a surge in smartphones from Chinese brands packing 8,000mAh or larger batteries. Now, a tipster claims that Samsung SDI is testing a massive 20,000mAh dual-cell battery for smartphones. Samsung isn’t exactly known for pushing battery capacities in its smartphones. Even its latest flagship, the Galaxy S25 Ultra, comes with a 5,000mAh cell. However, according to a tipster, Samsung SDI is currently testing a dual-cell silicon–carbon battery with a massive 20,000mAh capacity. According to the tipster, the dual-cell setup consists of a 12,000mAh cell measuring 6.3mm...
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