Samsung Galaxy S27 Ultra and Pro Battery Sizes Leak

Samsung is preparing notable power capacity increases for its next generation of top-tier mobile devices, according to a recent regulatory leak highlighted by 9to5Google.

The documents outline specific baseline energy figures for both the Galaxy S27 Ultra and the S27 Pro. Because these are rated measurements rather than final marketing numbers, the advertised specs will likely appear slightly higher once official sales begin. For context, the previous-generation Galaxy S26 Ultra carried a rated baseline of 4,855 mAh while marketing listed the hardware at 5,000 mAh.

Expected Capacity Growth

The standard Galaxy S26 device measured a physical size comparable to the upcoming Pro variant and featured a 4,300 mAh capacity, suggesting the incoming Pro model represents a substantial increase in power storage.

Meanwhile, the full-size Galaxy S27 Ultra points toward an increase of roughly 700 mAh. Although this represents a fourteen percent growth overall, it marks a notable shift following several years of stagnant capacity limits in previous generations. Alongside these changes, regulatory filing details indicate that both hardware models will support wired charging speeds up to 60W.

Industry Context and Silicon-Carbon Tech

These adjustments follow Samsung implementing silicon-carbon cell technology within the Galaxy Z Fold 8 lineup. While the latest regulatory documents do not explicitly confirm whether the upcoming S-series phones use this exact chemical makeup, the transition aligns with broader industry trends.

Rival Android manufacturers are currently utilizing silicon-carbon innovations to deliver significantly larger power reserves. Competing devices, such as the upcoming Oppo Find X10, face rumors of packing capacities reaching up to 8,000 mAh. As competing brands push past the 6,000 and 7,000 mAh thresholds, consumer expectations continue to rise regarding how hardware manufacturers handle mobile endurance.