Samsung Galaxy S27 Ultra Battery and Galaxy S27 Pro Battery Spotted, Bigger Capacities Tipped

• Galaxy S27 Pro and S27 Ultra batteries have appeared in South Korea’s Safety Korea certification.
• Leaked rated capacities suggest 5,087mAh for Pro and 5,534mAh for Ultra.
• Both phones are expected to support 60W wired and 25W wireless charging.

The Galaxy S27 Ultra Battery has appeared in a South Korean safety certification alongside the battery for the Galaxy S27 Pro. The listings identify separate battery model numbers for the two upcoming Samsung phones, ahead of the Galaxy S27 series launch expected early next year.

The certification confirms that the battery units have been listed for safety review, but it does not confirm Samsung’s final phone specifications or retail battery ratings. Previous leaks point to larger capacities for both models, with the Galaxy S27 Ultra expected to see the bigger increase.

Galaxy S27 Pro and S27 Ultra Batteries Clear Safety Korea

Samsung’s batteries for the Galaxy S27 Pro and Galaxy S27 Ultra have cleared South Korea’s Safety Korea agency. The Galaxy S27 Pro battery carries model number EB-BS957CBY, while the Galaxy S27 Ultra battery is listed as EB-BS958DBY.

The corresponding certification numbers are YU10899-26034 for the Pro battery and YU10899-26036 for the Ultra battery. The battery units are reported to be manufactured by Zhuhai CosMX Power in China. The listing is an early hardware sign, although it does not reveal every detail of the final retail products.

Galaxy S27 Pro and Galaxy S27 Ultra Battery Capacities

Earlier leaks indicate rated capacities of 5,087mAh for the Galaxy S27 Pro and 5,534mAh for the Galaxy S27 Ultra. Samsung could advertise higher typical capacities of 5,200mAh and 5,800mAh, respectively. These figures remain unconfirmed and should not be treated as final specifications.

Based on the leaked figures, the Galaxy S27 Ultra battery would be roughly 16% larger than the Galaxy S26 Ultra battery. The Galaxy S27 Pro is tipped to offer an increase of around 6% over the Galaxy S26+. These comparisons depend on the reported capacities and have not been confirmed by Samsung.

Charging Expectations for the Galaxy S27 Series

Both the Galaxy S27 Pro and Galaxy S27 Ultra are expected to support 60W fast wired charging and 25W fast wireless charging. These charging figures are based on leaks, and the certification details do not independently confirm charging speeds.

If the reported battery and charging details are accurate, the Ultra model would combine the larger battery with the same expected charging rates as the Pro. Actual charging time and battery endurance will depend on the final hardware and software, as well as usage conditions.

What the Battery Sighting Means for Buyers

The certification gives an early indication that Samsung is preparing battery components for two models in the next Galaxy S series. The expected capacities could offer a useful increase, particularly on the Galaxy S27 Ultra, but a larger rated capacity alone does not guarantee longer real-world battery life.

Samsung has not yet confirmed the Galaxy S27 series launch date or these battery specifications. The series is expected to arrive early next year. For context, see our reports on the expected Galaxy S27 series specifications and tipped Galaxy S27 series RAM and storage options.

Conclusion

The Safety Korea listings identify batteries for the Galaxy S27 Pro and Galaxy S27 Ultra, with model numbers EB-BS957CBY and EB-BS958DBY. Leaked figures suggest rated capacities of 5,087mAh and 5,534mAh, alongside expected 60W wired and 25W wireless charging. Samsung has not confirmed these details, so the final specifications may differ. Samsung has listed its current Galaxy devices on the official Samsung website.

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