Samsung Galaxy S27 Ultra battery photos point to major upgrade
Samsung‘s upcoming Galaxy S27 Ultra and Galaxy S27 Pro could feature significantly larger batteries, according to newly published certification photographs and regulatory documents.
Images of the two batteries have appeared in South Korea’s Safety Korea database, providing an early look at components expected to power the company’s next flagship smartphones.
The batteries carry model numbers EB-BS958DBY and EB-BS957CBY, corresponding to the Galaxy S27 Ultra and S27 Pro respectively, according to GSMArena.
Both are manufactured by Chinese company Zhuhai CosMX Power Jinwan Subsidiary.
Although the capacity markings are not legible in the photographs, earlier certification documents from China’s 3C regulator indicate that the Galaxy S27 Ultra could feature a 5,700mAh battery, compared with 5,000mAh in the Galaxy S26 Ultra.
That would represent a 14% increase, potentially marking Samsung’s first substantial Ultra-series battery capacity upgrade in several generations.
Meanwhile, the Galaxy S27 Pro could receive a battery with a typical capacity of approximately 5,200mAh.
Galaxy S27 Ultra may retain 60W charging
Chinese regulatory documents list rated capacities of 5,534mAh for the Galaxy S27 Ultra and 5,087mAh for the Galaxy S27 Pro.
Separate TÜV certification documents, reported on October 24, specify typical capacities of 5,700mAh and 5,240mAh, respectively.
Both models are also listed with support for 60W wired charging, matching the Galaxy S26 Ultra.
Samsung has reportedly been experimenting with larger batteries, including a 7,000mAh prototype for the Ultra model.
However, the company is believed to have opted for a smaller capacity to preserve the smartphone’s relatively slim design and integrated S Pen compartment.
Reports have also suggested Samsung could adopt silicon-carbon battery technology, which allows manufacturers to increase energy density without significantly enlarging the battery.
The certification documents do not confirm whether the technology will be used in the final devices.
The smartphones are expected to launch in early 2027, potentially in January or February, although an official presentation date has not been disclosed.
