That capacity would be marketed as 4,200 mAh, which aligns with some of the earlier rumors about the device. Most importantly, that’s a sizable upgrade from the meager 3,900 mAh of the Galaxy S25 Edge, even if Samsung won’t relent and switch to a silicon-carbon battery.
Unlike its predecessor, the S26 Edge is likely to face some competition. Apple is rumored to release the iPhone 17 Air, which may be even thinner and measure only 5.5 mm. In terms of battery capacity, Apple may be even more extreme and provide only a 2,900 mAh battery on the 17 Air. The company may rely on AI-powered battery management on iOS 26 to secure a full day of independent work.
In that context, the Galaxy S26 Edge battery sounds immense. Samsung is rumored to stick to the Snapdragon 8 Elite 2 (likely called Snapdragon 8 Elite Gen 5) and slim down the device by up to 0.3 mm, which would make it as thin as the iPhone 17 Air is rumored to be.
I’m not a big fan of the slim smartphone idea, but if the rumors about the Galaxy S26 Edge are true, this could be one of the most impressive smartphones on the market. Fitting a 4,200 mAh battery in the same space that Apple will fill with a 2,900 mAh battery, while managing the power of one of the most powerful mobile chips ever made, sounds like an engineering feat worthy of praise.
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