The Galaxy S27 Pro and Galaxy S27 Ultra batteries have appeared in the Safety Korea database, complete with photos. The batteries carry model numbers EB-BS957CBY and EB-BS958DBY, matching the phones' SM-S957 and SM-S958 identifiers, and are manufactured by Zhuhai Cos MX Power in China.
While the capacities aren't legible in the photos, previous leaks and China's 3C certification confirm them. The S27 Ultra battery is rated at 5,534 mAh (likely 5,700 mAh typical), while the S27 Pro is rated at 5,087 mAh (likely 5,200 mAh typical). Both devices support 60W wired charging, matching the Galaxy S26 Ultra.
If accurate, the S27 Ultra will offer 700 mAh more than the S26 Ultra's 5,000 mAh, and even the smaller S27 Pro will exceed it by 200 mAh. Samsung has maintained 5,000 mAh cells in its Ultra lineup for years, reportedly testing a 7,000 mAh prototype before opting for a smaller cell to accommodate the S Pen.
The S27 series launch timing remains unclear, though recent reports suggest Samsung may return to its traditional January/February timeframe.
Source: GSMArena · Summarized by HeadlinesBriefing