---
title: "Samsung Prepares Its Biggest Galaxy S Battery Upgrade Since 2020: Galaxy S27 Ultra to Get Up to 5700 mAh"
description: "3C certification records indicate that Samsung will increase battery capacity in the Galaxy S27 Ultra and S27 Pro to 5700 and 5200 mAh — the biggest battery upgrade in the series since the Galaxy S20."
date: 2026-09-21T11:20:00.000Z
lang: en
url: https://xab.info/en/posts/samsung-galaxy-s27-ultra-battery-5700-mah-certification
tags: [samsung, galaxy-s27, battery, smartphone, snapdragon, silicon-carbon]
publisher: "XAB.info"
---

# Samsung Prepares Its Biggest Galaxy S Battery Upgrade Since 2020: Galaxy S27 Ultra to Get Up to 5700 mAh

![Samsung готовит крупнейшее обновление батарей в Galaxy S с 2020 года: Galaxy S27 Ultra получит до 5700 мАч](https://xab.info/media/2026/09/21/samsung-galaxy-s27-ultra-batareya-5700-mach-sertifikaciya/samsung-galaxy-s27-ultra-batareya-5700-mach-sertifikaciya-1.webp)

## 🎯 Key Points

- Galaxy S27 Ultra may get a battery of around 5700 mAh (+14% over the S26 Ultra), Galaxy S27 Pro — around 5200 mAh
- The capacity increase is enabled by silicon-carbon technology already used in the Galaxy Fold 8
- The flagships are being prepared with the new Snapdragon SM8975 chip in three regional revisions
- Exact capacity figures differ between sources (5700 vs 5534 mAh); the data is based on leaks, not an official statement

Certification records from China's 3C regulator, cited by industry publications, indicate that Samsung will significantly increase battery capacity in the new Galaxy S27 Ultra and Galaxy S27 Pro flagships. According to regulator databases, the Ultra version may get a battery of around 5700 mAh — roughly 14% more than the current Galaxy S26 Ultra's 5000 mAh battery. The Pro model shows a figure of about 5200 mAh versus 5000 mAh in its predecessor. If the numbers are confirmed, this will be the most significant battery upgrade in the Galaxy S series since the Galaxy S20.

### Silicon-carbon technology as the basis for the increase

The key technological factor behind the capacity increase, experts say, is Samsung's gradual adoption of silicon-carbon battery technology. This solution has already proven its effectiveness in the complex foldable devices of the Galaxy Fold 8 series. The new materials allow a notable boost in energy density without a critical increase in body thickness or weight, which is especially important for thin flagships. Earlier leaks also indicated that 60W wired charging support would be retained for both new devices.

### New flagship Snapdragon chip

Beyond the batteries, the Galaxy S27 is being prepared with a new flagship Snapdragon chip, which has already appeared in Qualcomm's internal documents. To date, three parallel project variants under the chipset codename SM8975 have been registered: the SS_SM8975_GS27_AP build for the Asia-Pacific region, the SS_SM8975_GS27_KOR version for South Korea's home market, and the SS_SM8975_GS27_VZW modification for US carrier Verizon's requirements. All three project records are tied to the "Snapdragon_Premium_High_2026" software distribution package. A full presentation of the Galaxy S27 flagship series is expected soon.

### Contradictory data

It is important to note the discrepancy in exact capacity figures between sources. In primary leaks and roundup materials, the Galaxy S27 Ultra appears with a battery of "around 5700 mAh," whereas the ixbt.com article headline lists the certified Ultra capacity as 5534 mAh. Both versions agree on the main point — a substantial increase over the S26 Ultra's 5000 mAh — but the exact value may differ depending on the specific regional revision or rounding method. Moreover, all information is based on regulator databases and leaks, not on an official Samsung press release, so final specifications may be adjusted by the manufacturer before the presentation.

### What this means for the user

For the end user, the combination of increased capacity, silicon-carbon chemistry, and retained 60-watt wired charging means noticeably longer battery life without a charger — according to insider estimates, the device can last a full day of intensive use. Nevertheless, until Samsung officially confirms, all figures cited should be considered highly probable but not final.

## 🔍 Fact-Check Verification

- [It will last a full day without a charger: Galaxy S27 battery capacity revealed](https://www.rbc.ua/ukr/news/pratsyuvatime-tsiliy-den-rozetki-rozkrito-1789984833.html) - Подтверждает значительный прирост ёмкости и автономность на целый день; точные цифры не противоречат обобщённым данным.
- [Samsung finally increases its flagship's battery — Galaxy S27 Ultra certified with a battery capacity of ...](https://www.ixbt.com/news/2026/09/19/436750-samsung-nakonec-to-uvelicit-batareiu-svoego-flagmana-galaxy-s27-ultra-sertificirovan-s-batareei-emkostiu-5534-mac.html) - Указывает сертифицированную ёмкость Ultra как 5534 мАч — расхождение с цифрой ~5700 мАч из обобщающих утечек.
- [Galaxy S27 Pro and S27 Ultra models reportedly get a significant battery improvement](https://www.notebookcheck-ru.com/Soobshchaetsja-chto-modeli-Galaxy-S27-Pro-i-S27-Ultra-poluchat-znachitelnoe-uluchshenie-akkumuljatora.1403813.0.html) - Подтверждает значительное улучшение аккумуляторов в обеих моделях Pro и Ultra.
- [Samsung Galaxy S27 and S27 Ultra flagships to impress with large batteries: details from an insider](https://focus.ua/digital/768321-flagmany-samsung-galaxy-s27-i-s27-ultra-udivyat-emkimi-akkumulyatorami-detali-ot-insajdera) - Инсайдерские детали об ёмких аккумуляторах флагманов; согласуется с общей картиной.

## ❓ FAQ

### Q: How much will the battery in the Galaxy S27 Ultra increase?
**A:** According to 3C certification records, capacity may grow by roughly 14% — to around 5700 mAh versus 5000 mAh in the Galaxy S26 Ultra. At the same time, one source cites a specific certified figure of 5534 mAh.

### Q: What battery is expected in the Galaxy S27 Pro?
**A:** Regulator documents point to a battery of about 5200 mAh, whereas the predecessor's figure is 5000 mAh.

### Q: Why did capacity grow without thickening the body?
**A:** Samsung is adopting silicon-carbon battery technology, which raises energy density without a critical increase in thickness or weight; it has already been used in the Galaxy Fold 8 series.

### Q: Is this official information from Samsung?
**A:** No. The data is based on China's 3C regulator databases and leaks, not on an official Samsung press release, so final specifications may be adjusted before the presentation.