The upcoming Samsung Galaxy S26 Edge is shaping up to be one of the slimmest and most ambitious smartphones of 2025, but don’t expect revolutionary battery tech. New details from China’s 3C regulatory body confirm that Samsung will not be switching to silicon-carbon cells this time. Instead, the Galaxy S26 Edge will stick with familiar lithium-ion technology.
The filing, spotted by SamMobile, lists the S26 Edge’s battery under the part number EB-BS947ABY. It carries a rated capacity of 4,078 mAh, which Samsung will likely market as 4,200 mAh. That represents a noticeable upgrade from the 3,900 mAh cell in the current Galaxy S25 Edge. While some enthusiasts may be disappointed that silicon-carbon batteries aren’t arriving yet, the extra capacity is still a meaningful step forward.
The S26 Edge is rumored to launch earlier than its predecessor as part of Samsung’s strategy to streamline its flagship lineup, reportedly replacing the Galaxy Plus model. The device will debut alongside the rest of the Galaxy S26 family in early 2025.
Competition, however, is heating up. Apple is expected to unveil the iPhone 17 Air, rumored to be just 5.5 mm thin but fitted with a modest 2,900 mAh battery. Apple may lean on AI-driven battery management in iOS 26 to stretch performance across a full day. By comparison, Samsung’s decision to fit a 4,200 mAh battery into a similarly slim body is an engineering accomplishment.
Inside, the Galaxy S26 Edge is tipped to run on Qualcomm’s upcoming Snapdragon 8 Elite 2 (likely branded Snapdragon 8 Elite Gen 5). Reports suggest Samsung will slim the phone’s frame by around 0.3 mm, making it as thin as Apple’s rumored iPhone 17 Air, while still maintaining a larger battery.
Although some users may dislike the industry trend toward slimmer devices, the Galaxy S26 Edge could strike the right balance between style and stamina. A powerful flagship SoC, refined design, and a larger battery—despite the lack of silicon-carbon innovation—may still make it one of 2025’s most impressive smartphones.
