Samsung‘s 2025 flagship lineup is already a hot topic, and next-gen upgrades have already started fueling the conversation. Rumors hint at some major changes in the Galaxy S25 series, one of which is the battery capacity.
One of the recent leaks suggests that the Galaxy S26 Ultra could feature a massive 7,000mAh battery—2,000mAh more than this year’s model. That’s a bold claim considering the upgrades we have seen in recent years.
Meanwhile, it’s been a while since Chinese smartphone brands have shifted to silicon-carbon battery technology. It offers higher energy density, allowing for much larger battery capacities within the same physical space. As a result, 6,000mAh batteries have practically become the baseline for many Chinese smartphone makers.
Samsung may not join the race too soon
But will Samsung really join this battery race so soon? Well, tipster @PandaFlashPro says no.
“I’ll delete my Twitter account if Samsung gives the Galaxy S26 Ultra a 7000mAh or even a 6000mAh battery I bet. Based on my Five Sources, the internal Samsung Test Lab only seem to have a Capacity of Max 5500mAh not more,” he claims.
The US smartphone market follows a completely different strategy compared to China. So, it wouldn’t be surprising if Samsung adopts silicon anode battery tech but only slightly increases the battery capacity, or simply sticks with its current technology for a few more years. After all, as long as Apple isn’t adopting the tech, Samsung doesn’t feel much pressure in most markets outside China.
However, it’s also worth noting that Samsung has lately been leaning toward slimmer phone designs once again. It released the relatively slimmer Galaxy Z Fold SE last year, teased the Galaxy S25 Edge this year (speculated to be the slimmest Galaxy S ever made), and is also rumored to be working on a relatively slimmer Z Fold – the upcoming Z Fold 7. The brand may leverage the benefits of Si/C batty tech to make the devices thinner while maintaining or slightly raising the battery capacity. Although there isn’t a report or rumor to back this as of now.
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