Samsung is teasing a tri-fold Galaxy phone, and a leak from @PandaFlashPro reveals its prototype packs a silicon-carbon battery. The South Korean giant reportedly aims to keep its tri-fold slim, and the new battery technology could help reduce thickness. The phone is rumored to launch in the second half of 2025.
Samsung’s tri-fold ambitions were hinted at during January’s Unpacked event, alongside XR headsets and AR glasses. If true, this leak about the silicon-carbon battery would mark a first for Samsung. A previous leak hinted at its adoption in the S26 series. Although the battery capacity is expected to remain similar—around 5,500mAh for the S26 Ultra—it could help reduce the phone’s weight and thickness. The same could be expected from the upcoming Galaxy tri-fold.
Unlike traditional Li-ion batteries with graphite anodes, silicon-carbon tech uses a silicon anode for higher energy density, enabling more power storage in less space.
The catch? The tri-fold’s battery is reportedly under 5,000mAh, prioritizing a thinner design over extended runtime. For context, Chinese smartphone makers such as vivo and Xiaomi are now offering 6,500 to 7,000mAh batteries, which is shifting expectations in both the smartphone and power bank markets. Samsung is reportedly focusing on the thickness of the Z Fold 7, and it seems to have a similar strategy for its tri-fold.
Silicon-carbon’s higher density could allow Samsung to shrink the battery while still matching the 4,400mAh capacity of the Z Fold 6. But since this leak is based on a prototype, the tri-fold’s final form—possibly launching in July 2025 alongside the Z Fold 7—remains uncertain. Will Samsung nail the balance of thinness, durability, and battery life, or is this tech still too early for prime time? With Huawei’s Mate XT tri-fold already on the market, Samsung will face stiff competition, at least in China.
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