"The key is the introduction of silicon-carbon batteries, which make it possible to fit more battery capacity into the same size cell, as in phones like the Honor Power, whose 8,000mAh battery delivers more power than some iPads. The flip side of that is putting the same capacity into much smaller cells, seen in the likes of the Oppo Find N5, a foldable phone that's as extraordinarily thin as Samsung's Galaxy Z Fold 7 but has a 5,600mAh battery that wouldn't be out of place in an Ultra-sized flagship."
"Honor and Oppo aren't the only companies on board. Huawei, Xiaomi, Vivo, OnePlus, Nothing, and more have all released phones using silicon-carbon batteries. It's not just phones, either; Whoop wearables have used silicon-carbon batteries since 2021 thanks to a partnership with Sila Nanotechnologies, and EV manufacturers from General Motors to Porsche have invested heavily in the technology."
Silicon-carbon battery chemistry increases energy density, allowing manufacturers to pack more capacity into the same cell volume or shrink cell thickness while retaining capacity. That enables unusually large batteries in standard-sized phones—examples include an 8,000mAh cell rivaling some tablets—and extraordinarily thin foldables with flagship-sized capacities around 5,600mAh. Multiple smartphone brands and wearable companies have adopted silicon-carbon cells, and automakers have invested in the technology for electric vehicles. Regional product choices determine whether consumers receive thicker phones with massive batteries or slimmer devices with equivalent capacity, affecting form-factor and battery-life tradeoffs.
Read at The Verge
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