Samsung Galaxy S27 Ultra and Pro batteries pictured for the first time

Samsung is one of the few Android manufacturers that has not yet adopted silicon-carbon batteries for its Galaxy devices. The company may soon change this stance with the upcoming flagship models, as evidenced by recent battery images of the Galaxy S27 Ultra and Galaxy S27 Pro. These images, released through an official South Korean safety certification, show batteries labeled as EB-BS958DBY and EB-BS957CBY, corresponding to the model numbers of the Galaxy S27 Ultra (SM-S958) and S27 Pro (SM-S957), respectively. These batteries are produced by Zhuhai CosMX Power.

While the low-resolution images do not allow for a clear reading of all the details on the battery packs, including their capacities, a separate certification from China's 3C, published in September, suggested larger cells for the two premium Galaxy S27 models. According to this information, the Galaxy S27 Ultra is expected to feature a 5,534 mAh rated cell, while the Galaxy S27 Pro will have a 5,087 mAh capacity.

These ratings indicate that Samsung could advertise typical capacities of 5,700 mAh and 5,200 mAh for the respective devices. Although this increase may not be as dramatic as the jump from a 7,000 mAh silicon-carbon battery seen in some competitors, it still represents a significant improvement over the 5,000 mAh capacity found in previous premium Galaxy devices.

The batteries in both models use the same Li-ion chemistry, rather than the newer silicon-carbon technology found in some Chinese flagship devices, which accounts for the modest capacity increase.