Two Demko certificates pin the Galaxy S27 to the 25W ceiling from 2020; the Pro and Ultra are reported at 60W.
PetaTech24 Technology Desk | October 30, 2026
Galaxy S27 battery charging is stuck at 25W, according to two safety certificates published on October 30, 2026. UL Solutions (Demko) rated ten regional variants at 9V and 2.77A, or 24.93W, the figure Samsung markets as 25W. It is the same ceiling as the Galaxy S20 in 2020.
Certificates DK-187425-UL and DK-187435-UL, issued October 23, 2026, were published in the IECEE database. They match an earlier 3C filing from early September for the Chinese model, SM-S9520, with the same 9V and 2.77A profile. PhoneArena and NotebookCheck both reported the certificates on October 30, but both describe the same evidence, so they count as one evidence chain, not two confirmations.
The rest of the lineup is what makes the number sting. The Galaxy S27+ was listed at 45W in the same 3C database, while the Pro and Ultra were listed at 60W. If those listings hold, the cheapest phone in the range charges at less than half the peak speed of its most expensive sibling.
The Short Version
- Two UL Solutions (Demko) certificates, issued October 23, 2026, rate ten Galaxy S27 variants at 9V and 2.77A, or 25W.
- Galaxy S27 battery charging is capped at the same 25W ceiling as the Galaxy S26, a rating the base model has carried since the Galaxy S20 in 2020.
- China’s 3C listings from September put the S27+ at 45W and the Pro and Ultra at 60W, the peak the Galaxy S26 Ultra introduced.
- The Pro and Ultra batteries are reported at 5,200mAh and 5,700mAh, from a report of the 3C listings, not the Demko certificates.
- No battery capacity or wireless charging figure for the standard Galaxy S27 appears in either certificate.
The Bigger Picture
Galaxy S27 battery charging speed is the most visible daily difference between a base flagship and its siblings: a 60W peak is 2.4 times the 25W figure, and a 45W peak is 1.8 times it. That split is why Galaxy S27 battery charging matters beyond a spec sheet: Samsung told investors on its third quarter earnings call that each model in its next Galaxy S series should feel distinct, and the charging figures fit that plan. The cheapest model risks reading as the compromise model.
Galaxy S27 battery charging: what the certificates say
The Galaxy S27 battery charging figure comes from safety certification, not Samsung marketing. UL Solutions (Demko), the Danish body behind the IECEE listings, rated the device as a mobile phone at 9V DC and 2.77A. The rating works out to 24.93W, which Samsung markets as 25W.
A certification rating is a ceiling, not a promise of speed in every minute of a charge. Charging slows as the battery fills, so the figure describes the peak, not the average.
The ten model numbers
The filings cover ten model numbers: SM-S952B and SM-S952B/DS for Europe and other regions, SM-S952U and SM-S952U1 for the US, SM-S952W for Canada, and SM-S952N for South Korea. The SM-S9520 covers China, Hong Kong and Taiwan, while Japan gets the SC-51H, SM-S952Z and SM-S952Q. Neither certificate mentions wireless charging.
Galaxy S27 battery charging vs the rest of the lineup
Galaxy S27 battery charging sits at the bottom of its own range. The Plus, Pro and Ultra figures come from China’s 3C database in September, a separate evidence chain, and the battery capacities come from a PhoneArena colleague’s report of those listings. The wired speeds are listed, while the capacities are reported, not certified.
The 60W figure matches the peak the Galaxy S26 Ultra introduced: Samsung is spreading its fastest charging wider, not raising it. The Pro and Ultra filings also state that both phones ship without a charger, so buyers who want the 60W peak will need a charger rated for it. Capacity alone will not settle which phone lasts longest, so this article declares no battery winner, with no same-body evidence to support one.
Six years at the same ceiling
The 25W rating has been the base model’s standard since the Galaxy S20 in 2020, per NotebookCheck. Galaxy S27 battery charging is the rare specification that has not moved in six years.
Galaxy S27 battery charging trails both of its main rivals on the evidence reported so far. PhoneArena reported that the Pixel 11 and the iPhone 17 both support faster charging speeds than the base Galaxy S27. Neither outlet gave rival wattages, so this article does not state them.
Confirmed, reported and still unknown
The Galaxy S27 battery charging leak is a stack of evidence of different strengths. PhoneArena and NotebookCheck describe the same Demko certificates: one evidence chain. The 3C listings are a second chain, and the capacities are a report of that chain. NotebookCheck also reported rumours of an Exynos 2700 chip in most global markets, a Snapdragon 8 Elite Gen 6 in the US, and a privacy display. None of that is confirmed.
Galaxy S27 battery charging: what it means for buyers
For Galaxy S27 battery charging, the practical question is how you charge. Overnight, 25W and 60W finish in the same place. In short bursts, the gap is real, and the Plus, Pro or Ultra will add far more charge in the same ten minutes.
Pick the base Galaxy S27 if compact size and the lowest price matter most and overnight charging covers your routine. Pick the Plus for a larger screen and faster top-ups. Pick the Pro or Ultra if fast charging and the largest reported batteries matter, and budget for a 60W charger: neither is reported to include one in the box. No price has been announced for any model.
What to Watch Next
Watch whether Galaxy S27 battery charging stays at 25W at launch, and whether the 3C figures of 45W and 60W survive. The agreement between the Danish and Chinese filings makes a late change less likely. The launch window most often reported is the first quarter of 2027, but no date is announced.
Quick Answers
What is the Galaxy S27 battery charging speed?
Galaxy S27 battery charging is rated at 25W wired, per two UL Solutions (Demko) certificates issued October 23, 2026, listing ten SM-S952 variants at 9V and 2.77A.
How fast will the Galaxy S27 Pro and Ultra charge?
Both are reported at 60W, based on China’s 3C listings from September, which recorded 20V and 3A for the SM-S9570 and SM-S9580. The figure is listed, not certified, and matches the peak the Galaxy S26 Ultra introduced.
What battery capacities are reported for the S27 lineup?
The Ultra is reported at 5,700mAh and the Pro at 5,200mAh, via a PhoneArena report of the 3C listings. No capacity is confirmed for the standard Galaxy S27 or the S27+.
Does the Galaxy S27 support wireless charging?
That is unknown. Neither Demko certificate mentions wireless charging. The Galaxy S26 supports 15W wireless charging, but Samsung has not confirmed the figure for its successor.
When will the Galaxy S27 launch, and what will it cost?
Samsung has announced no launch date and no price. Coverage most often points to the first quarter of 2027, but no USD or EUR price exists yet.
The Takeaway
Galaxy S27 battery charging at 25W is now certified, not rumoured, and the certificates cover every major market. The base model keeps the 2020 ceiling; the Plus, Pro and Ultra are listed or reported at 45W and 60W. That split is the story: one lineup, three charging speeds, the cheapest phone charging slowest.
Do not read the 25W figure as a verdict on the whole phone: the chip, cameras, display and price are all still unknown, and overnight charging makes the gap invisible for many people. But buyers who top up in short bursts should plan around it.
Sources and Attribution
- PhoneArena, Polina Kovalakova, Latest Galaxy S27 battery leak suggests Samsung is repeating its old mistakes, October 30, 2026. https://www.phonearena.com/news/galaxy-s27-battery-leak-brings-bad-news_id184442
- NotebookCheck, Antony Muchiri, New Galaxy S27 listing confirms disappointing charging speeds, October 30, 2026. https://www.notebookcheck.net/New-Galaxy-S27-listing-confirms-disappointing-charging-speeds.1438000.0.html
- PetaTech24, Samsung Galaxy S27 Plans From the Q3 Earnings Call, October 30, 2026 (post 2084). Internal context on the earnings call. https://petatech24.com/samsung-galaxy-s27-plans-q3-earnings-call/
PetaTech24 tested nothing for this article. The Demko figures are certified, the 3C figures are listed, and the capacities are reported via PhoneArena’s report of the 3C listings. PhoneArena and NotebookCheck describe the same Demko certificates, so they count as one evidence chain.
