A A new report suggests that Samsung is developing batteries with stacked technology that could help the company offer future Galaxy flagships, like the Galaxy S26 Ultra, with a 5,500 mAh battery without making them bulkier.

this year, The Galaxy S25 Ultra will likely come with the same 5,000 mAh battery that Ultra phones have used since the dawn of time. Meanwhile, we have smartphone brands from China surprising us with huge battery capacities on their flagship smartphones for at least a year thanks to silicon carbide (SiC) batteries. Examples include honor magic 7 pro, oneplus 13, The Find X8 Pro and other devices all sport batteries above the 5,500 mAh mark.

However, Samsung is said to be taking a different approach to ensure the Galaxy S26 Ultra doesn’t get thrown into the trash due to a lack of battery upgrades. Samsung SDI is said to run on batteries with stacked technology. This technology will ensure a higher energy density of about 10% compared to the traditional method.

Chinese phone makers are betting on SiC batteries to have a 10% higher energy density compared to Li-ion. Using this technology, brands offer flagship phones with 5500 and 6000 mAh batteries without increasing thickness. This is an understandable thing that many people like.

Samsung seems to be sticking with Li-ion hence The Galaxy S24 Ultra and likely the upcoming S25 Ultra will be stuck with 5,000 mAh battery cells. The stacking method, just like using a SiC battery, will allow 10% higher power density. Samsung will likely only reserve this method for flagship phones (since they’re expensive to manufacture) so don’t expect to see a massive battery on the Galaxy A anytime soon. One thing that’s important to point out: This isn’t exactly new. Rumors of Samsung working on battery stacking technology have been circulating online for a couple of years, but have yet to materialize. So don’t get your hopes up too much just yet.

Meanwhile, Apple, Samsung’s main competitor, has been using stacked batteries for iPhones since 2018. iPhone 15 series debuting in 2023.

It is worth noting that there are other things that are important when it comes to battery life, not just the battery capacity itself. Processor, heat management, and software improvements also play a big role in battery life. For anyone, Galaxy S24 Ultra I managed to overcome The iPhone 15 Pro Max lasts longer in two out of three battery life tests (browsing and gaming), and it also lasts nearly two hours longer than the 16 Pro Max in 3D gaming.

So, while Samsung has some catching up to do with some Chinese manufacturers, battery life doesn’t seem to be a major concern for its flagship devices at the moment.