A new leak points to the first real battery bump for Samsung’s Galaxy S27 Ultra. Leaker Kro says Samsung has tested prototypes at 5,700mAh and 6,000mAh. That would break a long streak for the Galaxy S Ultra line, which stayed at 5,000mAh from the Galaxy S22 Ultra through the Galaxy S26 Ultra.
For people who use Samsung’s top phone, that matters. Battery life has been one of the bigger complaints, and more screen-on time for gaming, video, AI tasks, and camera processing would make this a lot more appealing if that version actually ships. Kro also says Samsung explored a 7,000mAh prototype.
There was a catch. According to the leak, Samsung only got that 7,000mAh version to fit by removing the built-in S Pen and its silo. That’s a serious trade-off for a feature that’s been part of the Ultra identity since the Galaxy S22 Ultra.
The extra capacity could come from silicon-carbon cells, which have already been rumored for Samsung’s Galaxy Z Fold 8, or from stacked batteries. Leaked CAD renders also hint at a redesigned internal housing that could open up more room without making the phone thicker or heavier.
You still can’t get the Galaxy S27 Ultra, and Samsung hasn’t confirmed any of this: battery size, chemistry, charging speed, thickness, weight, or heat management. And even 6,000mAh would still leave it behind some Chinese rivals that have already crossed 7,000mAh.
Author: Arlin Fabaliña
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