Samsung’s next flagship, the Galaxy S26 Edge, is starting to take shape ahead of its expected January 2026 launch. A new certification confirms the phone will get a welcome battery bump, but its ultra-slim design ambitions may not go as far as early rumors suggested.
Bigger battery confirmed
According to a listing spotted on China’s 3C database, the Galaxy S26 Edge (model SM-S947) will pack a 4,200mAh battery. The unit, filed under the code EB-BS947ABY, has a rated capacity of 4,078mAh. That’s a modest step up from the 3,900mAh cell inside the Galaxy S25 Edge, which launched earlier this year for around $1,000.
The upgrade could help address one of the S25 Edge’s biggest criticisms — endurance. The S25 Edge delivered only average screen-on time. A larger battery could give the S26 Edge an advantage over Apple’s rumored iPhone 17 Air, which is expected to carry a capacity as low as 2,900mAh. Apple is also rumored to be working on AI-powered resource management to stretch battery life, but raw capacity will still play a big role.
No silicon-carbon breakthrough
Early speculation suggested Samsung might adopt silicon-carbon battery tech, which could have allowed for a thinner 5.5mm profile while increasing capacity. However, the 3C certification makes it clear the S26 Edge is sticking with traditional lithium-ion. That likely means the phone will remain close to the S25 Edge’s 5.8mm thickness rather than rivaling Apple’s rumored 5.65mm design.
The shift also implies a potential weight increase compared to its predecessor, unless Samsung offsets it with lighter materials or other design tweaks.
With this certification now in place, the S26 Edge’s battery capacity and chemistry are essentially confirmed. While the upgrade should improve runtime, the lack of next-gen battery tech signals that Samsung’s “beyond slim, beyond light” vision won’t advance much further this generation.
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