Carbon battery in Galaxy S27 Ultra?
Recently, our extensive Galaxy S26 Ultra review appeared online. This one achieved fine battery life, but all is not earth-shattering. But possibly this is about to change. Indeed, the new Samsung Galaxy S27 Ultra is said to make a big leap when it comes to battery technology. While many devices have stuck around 5000 mAh in recent years, Samsung now seems to be experimenting with so-called carbon batteries. That technology allows for a higher energy density, which in simple terms means that more energy fits into a smaller space. For you as a user, that could bring two benefits: longer battery life and possibly a slimmer or even lighter device.
Interestingly, other major players, such as Apple and Google, have not yet taken this step. Meanwhile, Chinese manufacturers in particular have already gone further with this technology and are already offering capacities above 6000 mAh, or even 7000 mAh, in several devices.
Yet it is not all progress. The new batteries also bring challenges. For instance, they are said to be more sensitive to wear and tear and lose capacity faster. Samsung SDI's internal tests, for instance, indicate around 960 charge cycles, which is lower than what you are used to now. Also, the battery may expand slightly more at higher temperatures, requiring extra attention to safety and design.
Interesting detail: Samsung is reportedly considering making some form of battery replacement easier in future devices, possibly starting with the Samsung Galaxy S27 Ultra. That could be a smart move to compensate for the shorter battery life. That companies like Samsung and Google have been cautious so far shows that this technology is still in development. At the same time, it makes it clear that competitors, such as Xiaomi, have deliberately taken more risks to get ahead.
Earlier, rumours circulated about the Samsung Galaxy S27 Pro, which would offer the power of the Ultra model but appear without an S Pen.
