GoKawiilTL;DR Samsung has confirmed that the Galaxy Z Flip 8, Galaxy Z Fold 8, and Galaxy Z Fold 8 Ultra all have silicon-carbon batteries.
These are therefore the first Galaxy phones with silicon-carbon battery technology.
Samsung didn’t disclose more details about the tech but said you should expect battery health that’s “consistent” with previous products.
Smartphones with silicon-carbon batteries have been around since 2024, when HONOR debuted the tech. We’ve since seen the likes of OnePlus, OPPO, Xiaomi, and others all embrace this battery technology. Samsung has been one of the few high-profile holdouts, but that changes today.
Samsung confirmed during a media briefing and a media roundtable that the Galaxy Z Flip 8, Galaxy Z Fold 8, and Galaxy Z Fold 8 Ultra all have silicon-carbon batteries. That means these are the first Galaxy phones with this technology. Furthermore, the Galaxy Watch Ultra 2 also benefits from a silicon-carbon battery, making it quite possibly the first Samsung watch with this tech.
Silicon-carbon batteries offer the same battery capacity in a smaller physical size or increased capacity for the same physical size. This has resulted in flagship Android phones with 6,000mAh+ batteries, without a corresponding increase in thickness or weight. It’s also ideal for foldable phones, compact smartphones, and smartwatches, as these form factors don’t have much space for a large conventional battery. Pure silicon-carbon batteries do come with an increased risk of expansion, but manufacturers only use a small percentage of silicon content to mitigate this issue.
Does your current phone have a silicon-carbon battery? 6 votes Yes, it does 17 % No, it doesn't 67 % I'm not sure 17 %
What else to know about Samsung’s silicon-carbon batteries?
Paul Jones / Android Authority
The company refused to divulge the percentage of silicon content used in these new batteries, citing “confidentiality reasons,” but noted that the percentage was identical across all three foldable models.
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