Samsung uses silicon-carbon batteries in new Foldable phones

Samsung has officially adopted silicon-carbon battery technology for its latest generation of foldable smartphones, marking a significant shift in its component strategy. The company confirmed during media briefings this week that the Galaxy Z Fold 8, Galaxy Z Fold 8 Ultra, and Galaxy Z Flip 8 all feature the new battery type. The move allows for increased battery capacities within the same or slimmer device profiles, though the announced capacities remain more conservative than those of some rival brands.

The Galaxy Z Fold 8 Ultra now carries a 5,000mAh battery, a 600mAh increase over the 4,400mAh cell in its predecessor, the Galaxy Z Fold 7. The standard Fold 8 features a 4,800mAh battery, while the Flip 8 has a 4,300mAh cell. Company executives emphasized that the adoption involved extensive system-level engineering, not merely a component swap. They stated the goal was to balance the new technology's potential with rigorous standards for performance, longevity, and safety.

Silicon-carbon batteries are a variant of lithium-ion technology that replaces some of the graphite in the anode with silicon, which can hold more lithium by weight. This results in higher energy density,...