TLDR:

New silicon-carbon smartphone batteries offer huge capacities in thinner phones (0:25). While many companies like Xiaomi are using them, major players like Apple, Samsung, and Google are holding back (0:55). The main reason appears to be concerns about battery swelling and longevity due to silicon expanding significantly during charging (3:09). These companies are waiting for more real-world data and improved reliability before adopting the technology on a large scale (6:44), especially given their massive production volumes (6:31) and the potentially severe consequences of battery failure (5:21). The US market’s focus on software and ecosystem lock-in also means less pressure on hardware innovation (7:11).