Samsung appears to be finally listening to the wishes of its most loyal fans. The upcoming flagship model, the Galaxy S27 Ultra, will likely receive a major upgrade users have been waiting for for nearly six years – a larger battery capacity. This will be the first significant change in this area for the Ultra flagship series since 2020, when the Galaxy S20 Ultra was introduced.

According to the latest leaks from the database of China’s 3C regulator, the Galaxy S27 Ultra will be equipped with a battery with a rated capacity of 5534 mAh. This figure translates to a typical capacity of 5700 mAh. That means an increase of about 15% compared with the previous flagship, the Galaxy S26 Ultra, which, like its predecessors, featured a 5000 mAh battery.

The Korean tech giant has consistently kept battery capacity at 5000 mAh for seven generations — from the S20 Ultra to the S26 Ultra. This strategy was likely driven by Samsung’s push to improve the energy efficiency of its devices through chipset and software optimization. At the same time, the mobile market was moving in the opposite direction. Many Chinese manufacturers actively adopted the latest battery technologies, including silicon-carbon batteries, allowing them to equip their flagships with 7000–7500 mAh batteries, and sometimes even up to 8000 mAh, while still maintaining relatively thin bodies. This gap in battery capacity has become increasingly noticeable to users who want the longest possible battery life from their smartphones.

The same leak also shed light on another promising model — the Galaxy S27 Pro. This model is said to feature a 5200 mAh battery. It is assumed that the Galaxy S27 Pro will be positioned as a more compact version of the Ultra, but one that will not support the S Pen stylus. That could make it an attractive choice for users who value a balance between power and device size.

In addition to battery information, the certification revealed charging power details. Both the S27 Ultra and S27 Pro will support 60W wired charging. This matches the level of leading smartphones on the market, including the latest iPhone models, suggesting Samsung’s intention to provide fast recharging for its flagships.

The official launch of the new Galaxy S27 series is expected in early 2027, most likely in February. Interestingly, images of the Galaxy S27 Ultra have already appeared online, showing a refreshed device design. This indicates active work behind the scenes and that the official announcement is drawing closer.

Looking at market trends and the latest leaks, it can be assumed that the Galaxy S27 Pro may become one of Samsung’s most interesting smartphones of 2027. Its potentially smaller size combined with a powerful battery and modern hardware could make it a more practical choice for a wide range of users who do not need S Pen functionality but are looking for a premium flagship experience. This model could fill the gap between standard flagships and extreme “Ultra” versions, offering a balanced solution.

Increasing battery capacity in the Ultra flagship series is an especially important step, given the ever-growing demands placed on smartphone performance. Modern mobile games, video and photo editing apps, and the constant use of augmented reality features require significant power resources. While software and processor innovations help improve energy efficiency, increasing battery capacity remains one of the most direct and effective ways to extend battery life.

Raising the Galaxy S27 Ultra’s battery capacity to 5700 mAh, while not a record-breaking figure compared with some Chinese rivals, is still a major step forward for Samsung. It could become a decisive factor for many users who have previously hesitated to choose a flagship because of limited battery life. The combination of a powerful battery, optimized software, and energy-efficient components could result in truly impressive endurance that satisfies even the most demanding users.

In addition, introducing a unified 60W charging power for both models suggests Samsung wants to simplify the user experience and ensure fast charging regardless of the chosen device. It may also be a step toward standardization within the Samsung ecosystem, making it easier for users to use chargers across different brand devices.

Overall, the news about the Galaxy S27 Ultra and S27 Pro suggests that Samsung is seriously working to meet the needs of its users. A larger battery, a potentially refreshed design, and fast charging all point to a new flagship series that will be highly competitive and capable of delivering an exceptional user experience. Time will tell whether these upgrades can help Samsung regain a leading position in the flagship smartphone market, but the early signs are very promising.