Samsung is reportedly planning a pretty big shakeup for next year’s lineup of flagship smartphones, including a move to replace the typical ‘Plus’ model with a follow-up to the Galaxy S25 Edge. Now, we’re learning just how slim the Galaxy S26 Edge might get — and how much of a battery upgrade might come with it.

According to leaker Ice Universe, Samsung’s found a way to shrink that slim chassis down while still including a beefier battery. Next year’s Galaxy S26 Edge will apparently measure in at just 5.5mm thick — down from 5.8mm on this year’s release. That’s not coming at the expense of a bigger battery though; according to this leak, the S26 Edge will get a healthy boost up to 4,200mAh. That’s not a massive leap forward compared to the 3,900mAh cell in this year’s phone, and much more comparable to the 4,300mAh battery in the Galaxy Z Flip 7.

Galaxy S26 Edge 5.5mm 4200mAh

— PhoneArt (@UniverseIce) August 6, 2025

It’s unclear if that’s a large enough jump for Samsung to be utilizing silicon-carbon batteries, despite earlier reports from Ice Universe that the Edge would jump to “new battery material technology.” Considering it’s the second time in as many weeks as that 4,200mAh spec has appeared, however, it’s starting to sound like a done deal. Meanwhile, that 5.5mm frame should present itself as a little more impressive as this year’s Edge, matching rumors for Apple’s iPhone 17 “Air.” Both, unfortunately, still fall short compared to Motorola’s Moto Z from nearly a decade ago.

In addition to dropping the S26+ in favor of an Edge follow-up, Samsung’s rumored to be replacing the standard Galaxy S26 with something called the “Galaxy S26 Pro.” It’s unclear how that device will differentiate itself from new Edge and Ultra entries — or if it’s just a simple rebranding of the base model — but considering just how many S26 leaks are starting to bubble to the surface months from an eventual launch, we shouldn’t have to wait too much longer to find out.

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