The Samsung Galaxy S26 Edge will address one of the major complaints about the S25 Edge – the small 3,900mAh battery capacity – while pursuing the goal of ever-thinner designs. Ice Universe has shared several bits of information on the topic and now reports on the expected battery capacity and thickness of the 2026 model.
“Galaxy S26 Edge 5.5mm 4200mAh”, simply writes The Cat. That is 0.3mm thinner than the current Edge with 300mAh more in the tank.
However, a few days ago Ice reported that the S26 Edge will have a 4,400mAh battery instead. What’s going on? This might be the difference between “rated” and “typical” capacity. If you watch this S25 Edge teardown video, you will see the markings on its battery: 3,786mAh rated capacity and 3,900mAh typical capacity.
Galaxy S25 Edge’s battery from JerryRigEverything’s teardown video
That’s a difference of 114mAh, so 200mAh between the rated and typical capacity of the new model wouldn’t be too unusual. Or maybe these are just conflicting reports because Samsung is still trying to dial in the final design – remember, the Galaxy S26 series is not due for five months at least.
Based on a previous report, the Samsung Galaxy S26 Pro, the new small model that will replace the vanilla S phone, will have a 4,300mAh battery (typical capacity). That’s a 300mAh bump over the S25 and in line with the rumored 3,900mAh to 4,200mAh upgrade for the S26 Edge.
The leakster has mentioned a “new battery material technology” for the upcoming Edge, though it’s not clear whether that is silicon-carbon or not. Some reports indicate that Samsung would instead try to increase the volume available to the battery and increase capacity that way.
Again, the S26 generation is half a year away from being available in stores, so we will have to wait for more detailed leaks. In the meantime, Apple is also working on a slim phone, the iPhone 17 Air, which is expected to measure 5.5mm thick. Photos of its battery recently leaked – that thing is rather tiny.