The most common complaint about Samsung phones has a solution: the next Galaxy phone will have a large battery.
Finally, there is good news for Samsung's mobile phone battery. According to a recent leak, the South Korean company is currently testing a technology that could revolutionize its product lineup, allowing it to compete strongly with Apple while also closing the gap with its Chinese rivals, who excel at battery life. The time has come: Samsung phones are now testing their long-awaited silicon-carbon batteries.
What is a silicon-carbon battery? Simply put, it's a new technology focused on manufacturing cells with higher energy density, allowing for greater energy storage in the same size. In other words, batteries with a much larger capacity (mAh) in the same dimensions.
If this sounds familiar, it's not because Samsung is experimenting with it for the first time: silicon-carbon batteries have been on the market for months, and dozens of phones already use them. Xiaomi, Vivo, Oppo, and Motorola are just a few of the brands that use them. The result? Phones as thin as 7-8mm with batteries up to 7,500mAh. That's no small feat: the Oppo Find X9 Pro is 8.3mm thick and packs that many batteries.
These batteries are also used for another purpose: manufacturing much thinner phones, where battery life is not a limiting factor. The size of these cells can be reduced while maintaining a capacity close to normal, allowing for the production of devices as thin as 5-6 mm with 5000-6000 mAh batteries.
Samsung's next step: using silicon-carbon batteries in its Galaxy phones.
Sooner or later, they had to act. It's absurd that your competitors equip their phones with 7500mAh batteries while you're still using an outdated 5000mAh battery. The Galaxy S26 Ultra is a prime example; it suffers from half the battery life of its main rivals.
We now know that Samsung is already testing silicon and carbon batteries to understand their performance and how to integrate them into its devices. When will we see them in use? No one knows, although some industry experts are already talking about the Galaxy S27 Ultra as the leading candidate to launch this technology in Samsung's phone lineup.
What exactly is Samsung testing? Well, it's interesting because the leak reveals that the company isn't testing "mini" cells for smartphones, but rather 12,000- and 18,000-mAh batteries stacked in multiple cells. The applications could be varied, but the mere fact that they're researching this is a positive sign.
According to the leak, these stacked cells have a capacity of 6800 mAh and are 4.7 mm thick, specifications that more closely match the expected battery of the rumored Galaxy S27 Ultra. Is it too early to launch them? Yes, it is (the Galaxy S26 Ultra hasn't even hit the market yet), but the good news is that Samsung phones are getting a little closer to overcoming their biggest weakness: limited battery life due to not using the latest available technology.