Samsung Galaxy S27 Ultra and S27 Pro Batteries Revealed in New Certification

Samsung could finally be preparing a meaningful battery upgrade for its next flagship smartphones. New certification listings have revealed photographs of batteries reportedly intended for the upcoming Galaxy S27 Ultra and Galaxy S27 Pro, adding further weight to rumours that both devices will offer larger capacities than their predecessors.

The batteries have appeared in South Korea’s Safety Korea certification database, where images of the components are available alongside their identifying model numbers. Although the photographs do not clearly reveal the capacities, earlier certification information has already provided estimates of how much energy the upcoming phones could store.

If these details prove accurate, the Galaxy S27 Ultra could receive one of Samsung’s most notable battery upgrades in recent years, while the rumoured Galaxy S27 Pro could also arrive with a larger battery than the current Ultra model.

Galaxy S27 Ultra and S27 Pro Batteries Appear in Safety Korea

The latest certification listings identify two batteries believed to be intended for Samsung’s upcoming flagship smartphones.

The Galaxy S27 Ultra battery carries the model number EB-BS958DBY, while the battery associated with the Galaxy S27 Pro is listed as EB-BS957CBY.

Both components have reportedly been manufactured by Zhuhai CosMX Power’s Jinwan subsidiary in China. Their appearance in the certification database provides another indication that Samsung is progressing with preparations for its next-generation Galaxy devices.

However, the photographs themselves do not clearly display the battery capacities. To understand the likely figures, it is necessary to look at earlier certification records from China, which revealed more specific electrical ratings.

It is important to note that these are component-level certifications rather than an official announcement of the smartphones. Samsung has not yet confirmed the Galaxy S27 Pro or Galaxy S27 Ultra’s final specifications, and pre-production components can differ from those used in retail devices.

Galaxy S27 Ultra Could Get a 5,700mAh Battery

The Galaxy S27 Ultra is reportedly being developed with a battery carrying a rated capacity of 5,534mAh. This figure is expected to translate into a typical advertised capacity of approximately 5,700mAh.

For comparison, the Galaxy S26 Ultra has a typical battery capacity of 5,000mAh. If the reported figures remain unchanged, the upcoming Ultra model would gain around 700mAh of additional capacity.

That would represent a meaningful increase for users who rely on their smartphones throughout the day. A larger battery could provide more flexibility for activities such as video streaming, gaming, photography, navigation and mobile data usage.

However, battery capacity alone does not determine real-world endurance. Display efficiency, processor power consumption, software optimization and network conditions all influence how long a smartphone lasts between charges.

The reported 5,700mAh figure should therefore be treated as an expectation based on certification information rather than a confirmed Samsung specification.

Galaxy S27 Pro Could Feature a 5,200mAh Battery

The Galaxy S27 Pro is also tipped to receive a battery upgrade. Its reported rated capacity is 5,087mAh, which is expected to correspond to a typical advertised capacity of approximately 5,200mAh.

If accurate, that would give the Pro model a larger battery than the 5,000mAh unit found in the Galaxy S26 Ultra.

The potential upgrade is particularly interesting because the Galaxy S27 Pro is rumoured to feature a smaller display than the Ultra model. A battery of around 5,200mAh could offer a useful balance between battery endurance and a more compact design.

The Pro model itself has not been officially announced, so its final position within Samsung’s smartphone lineup remains uncertain. Reports suggest that it could sit between the standard Galaxy S27 and the Ultra, offering several premium features without including every feature reserved for the top model.

Whether Samsung will use different battery technology or internal design changes to accommodate the reported capacity remains unclear.

60W Charging Could Return on Both Models

Battery capacity is not the only detail emerging from certification records. Earlier Chinese certification listings reportedly indicated that both the Galaxy S27 Ultra and Galaxy S27 Pro would support up to 60W wired charging.

If confirmed, this would mean the two phones could retain the same maximum wired charging power as the Galaxy S26 Ultra, despite their potentially larger batteries.

A larger battery combined with 60W charging could provide a useful balance between endurance and charging speed. However, the time required to recharge each device would depend on its battery size, charging curve, temperature and the power adapter used.

The certification information does not establish the final charging times or confirm whether Samsung will include a compatible charger in the retail box.

Wireless charging details also remain unconfirmed in the latest battery listing. Buyers should wait for the official specification sheet before drawing conclusions about the complete charging experience.

Could Samsung Adopt Silicon-Carbon Battery Technology?

Samsung’s potential battery upgrade has also raised questions about whether the company could adopt silicon-carbon battery technology in its upcoming flagship smartphones.

Silicon-based anode materials can potentially increase energy density compared with conventional graphite-based designs. In principle, this could allow manufacturers to fit more battery capacity into a similar amount of space.

However, the latest certification photographs do not confirm which battery chemistry Samsung will use in the Galaxy S27 Pro or Galaxy S27 Ultra.

The reported capacity increases alone are not sufficient evidence to establish that either device will use silicon-carbon batteries. Samsung has not officially disclosed the chemistry, cell construction or internal battery design of the upcoming models.

For now, the most reliable takeaway from the certification records is that battery components associated with both phones are progressing through regulatory checks.

Why a Bigger Battery Matters for Galaxy S27 Users

Battery life remains an important consideration for flagship smartphone buyers. Modern devices handle increasingly demanding tasks, including high-resolution photography, gaming, navigation, video recording and AI-powered applications.

These activities can place considerable demands on a phone’s battery, particularly when users spend extended periods away from a charger.

An increase from 5,000mAh to approximately 5,700mAh could provide Samsung with more flexibility when balancing performance and endurance. The potential 5,200mAh battery in the Pro model could similarly benefit users who want a premium device without choosing the largest phone in the lineup.

Still, a larger battery does not guarantee a proportionate increase in usage time. Software optimization, display brightness and processor efficiency can make a substantial difference, meaning real-world testing will be necessary to evaluate the benefits.

The final device dimensions and weight will also matter. Samsung will need to balance the additional capacity with comfort, portability and the internal space required for other hardware.

Galaxy S27 Series Launch and Availability

Samsung has not officially announced the Galaxy S27 series or confirmed a launch date for the Galaxy S27 Pro and Galaxy S27 Ultra. The lineup is expected to arrive in 2027, but the company has yet to disclose the final schedule.

The new battery certifications are another step in the development process, not confirmation that the phones are ready for retail release.

Pricing, regional availability, processor configurations, camera specifications and other hardware details remain subject to future announcements and leaks. The final battery capacities could also change before production devices reach customers.

What to Expect From Samsung’s Next Flagships

The latest battery certifications suggest that Samsung could be preparing larger batteries for both the Galaxy S27 Ultra and the rumoured Galaxy S27 Pro.

The Ultra is linked to a rated capacity of 5,534mAh, potentially translating to a typical 5,700mAh battery, while the Pro is associated with a rated capacity of 5,087mAh and a possible typical rating of 5,200mAh. Earlier certification information also points to 60W wired charging for both devices.

If these details prove accurate, Samsung could deliver a welcome improvement in battery capacity without increasing the maximum wired charging power.

For now, the certification records offer an encouraging early look at the company’s plans, but the final specifications and real-world battery performance remain unknown. Samsung’s official announcement will determine whether these expected upgrades make it into the finished Galaxy S27 smartphones.