Samsung may finally be preparing a significant battery upgrade for its Galaxy S Ultra series.
According to a new leak, the Galaxy S27 Ultra is being tested with larger battery capacities.
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Leaker phonefuturist reports that Samsung is evaluating 5,600mAh and 5,800mAh battery cells from Samsung SDI for the upcoming flagship.
A more modest 5,200mAh option was also mentioned.
Since the Galaxy S20 Ultra, Samsung has used a 5,000mAh battery in its Ultra models.
The company prioritized safety and slim design after the Note 7 incident, but competitors have moved ahead.
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Apple's iPhone 17 Pro Max already surpasses Samsung's current capacity, and the iPhone 18 Pro Max is expected to go even higher.
The tested batteries use standard lithium-ion chemistry rather than newer silicon-carbon technology.
This suggests Samsung is sticking with proven, reliable components to control costs and avoid potential risks, which could also help keep the price increase in check.
If the testing goes well, the Galaxy S27 Ultra could ship with a battery well over 5,500mAh.
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That would be a meaningful upgrade for power users who have long awaited a larger cell.
It's important to note that these are still rumors. The Galaxy S27 series is months away from launch, and specifications can change.
However, a larger battery would complement other expected improvements, such as a wider Privacy Display and a refreshed camera island design.
For Galaxy fans who have felt the Ultra's battery capacity has stagnated, this development could be a welcome change.
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More concrete details are expected closer to the official launch.
