The battery capacity of the Galaxy S25 Ultra has remained at the 5000mAh level, a number that has not improved in several generations of products. However, the South Korean conglomerate is reportedly reviewing a plan to feature silicon-carbon batteries in the upcoming Galaxy S26 series.
If Samsung adopts this plan, its battery capacity will break through the 5000mAh threshold and enter the large capacity range of 7000mAh, thereby achieving record battery life.
But the biggest obstacle Samsung is worried about is that if silicon-carbon batteries are used in the Galaxy S26 series, product stability problems may occur.
It has been previously reported that both Apple and Samsung will switch to silicon-carbon batteries, a move that will not affect the thickness of smartphones but ensure a larger battery size. There is no news yet on when Apple will launch the first iPhone using this technology, but Fnnews believes that the Galaxy S26 series will be the first to debut this huge internal change. Reports spotted by @Jukanlosreve say Samsung may opt for an internal battery in the 6000mAh to 7000mAh capacity range.
Understandably, the company has some concerns about adopting silicon-carbon technology. The report mentioned that many Chinese smartphone manufacturers have embraced this change, while Samsung has been conservative in this approach because it produces more devices than any other original equipment manufacturer in the world using Google's Android platform. This reason alone will increase the risk of stability issues, which may turn into another Galaxy Note7-style disaster.
This conservative stance may also explain why Samsung has been reluctant to introduce fast charging technology to its smartphones. The maximum power of its Galaxy S25 series is still limited to 45 watts. But the Korean company has to consider doing this in order to remain competitive with other manufacturers, and may even force Apple junglers to switch to this technology.