Silicon carbon battery technology that delivers longer lasting life has finally made it into a flagship Samsung phone: the Galaxy Z Fold 8 series.
Now that Samsung has taken the leap, it looks like the Korean company will deploy a more extreme version of the tech in the Galaxy S27 Ultra and new Galaxy S27 Pro.
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Samsung Galaxy S27 To See Big Battery Life IncreaseThe Samsung Galaxy S26 Ultra high-end smartphone by Samsung displays the screen showing ''Galaxy S26 Ultra Galaxy AI,'' featuring advanced AI-driven functionalities, next-generation imaging systems, and a premium AMOLED display for enhanced mobile experiences.
The S27 Ultra goes further with a rated 5,534mAh, expected to be advertised at around 5,700-5,800mAh.
Silicon carbon battery technology that delivers longer lasting life has finally made it into a flagship Samsung phone: the Galaxy Z Fold 8 series. My December prediction was right, just wrong about which device we'd see it in. Now that Samsung has taken the leap, it looks like the Korean company will deploy a more extreme version of the tech in the Galaxy S27 Ultra and new Galaxy S27 Pro.
Read on for more and don't forget to subscribe to my newsletter for instant Samsung Galaxy deal alerts.
Samsung Galaxy S27 To See Big Battery Life Increase
The Samsung Galaxy S26 Ultra high-end smartphone by Samsung displays the screen showing ''Galaxy S26 Ultra Galaxy AI,'' featuring advanced AI-driven functionalities, next-generation imaging systems, and a premium AMOLED display for enhanced mobile experiences. It highlights innovation in intelligent mobile technology, computational photography, and performance-focused Android devices during the Mobile World Congress (MWC) in Barcelona, Spain, on March 3, 2026. (Photo by Joan Cros/NurPhoto via Getty Images) NurPhoto via Getty Images
According to Galaxy Club and Korean tipster Lanzuk on Naver, the new Galaxy S27 Pro is expected to carry a rated battery capacity of 5,087mAh, advertised as approximately 5,200mAh.
The S27 Ultra goes further with a rated 5,534mAh, expected to be advertised at around 5,700-5,800mAh. Galaxy Club notes both figures indirectly confirm silicon-carbon technology will power both devices.
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For the uninitiated, silicon-carbon batteries are still lithium-ion batteries. The difference is in the anode, where silicon is blended with carbon instead of using pure graphite. Silicon can store significantly more lithium than graphite, which is why you can fit more battery capacity into the same sized cell.
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The downside is that silicon-carbon expands by up to 300% when absorbing lithium during charging, which can crack the anode over time. That means a shorter life cycle before it has to be replaced. Some smart engineering controls that expansion but it's a trade-off gadget manufacturers have to accept when using silicon carbon.
T3 spotted that the Galaxy Z Fold 8 series lists a minimum battery endurance of 1,200 charging cycles in its own spec sheets, down from 2,000 cycles on the Galaxy Z Fold 7 and Z Flip 7. That's a 40% reduction in Samsung's own minimum guarantee, and the real trade-off of silicon-carbon in a smartphone. For now, at least.
