Galaxy S27 Ultra may feature 5700mAh battery and charge faster, report says

The Samsung Galaxy S27 Ultra may reach a 100% battery charge roughly 2% to 3% faster than the previous Galaxy S26 Ultra, despite retaining a maximum 60W charging specification, according to a report by Android Headlines based on an X rumor.

Next Ultra Model May Feature 5,700mAh Battery

Regulatory documents spotted previously indicate that the next-generation Ultra may ship with a 5,700mAh battery unit, breaking the 5,000mAh capacity barrier that has limited previous Galaxy S flagships for years. By comparison, the Galaxy S26 Ultra benefited from a significant battery upgrade, which initially led observers to believe Samsung might not prioritize further capacity increases for the subsequent generation. However, recent rumors show the manufacturer intends to push momentum forward.

Even with the larger capacity, maximum charging speeds will reportedly remain capped at 60W. Internal tests cited in the reporting suggest that optimization allows the device to offset the larger size and replenish power slightly faster than its predecessor.

Optimization as a Performance Driver

The counterintuitive result of a larger battery charging at a faster relative rate relies entirely on advanced optimization techniques developed by Samsung. It remains unknown whether Samsung can deploy these battery optimization tricks to older models like the Galaxy S26 Ultra through future firmware updates. That capability likely depends on whether the underlying software solutions apply generally or require the unique hardware of the Galaxy S27 series.

Uncertainty also surrounds the rest of the Galaxy S27 lineup, which is expected to include a base model, a Plus model, and a Pro model alongside the Ultra. Whether those variants will receive similar battery optimization solutions has not been disclosed.

Expected Announcement Timeline

Samsung is expected to officially announce the Galaxy S27 lineup in January or February of next year. Leaks and regulatory filings will likely continue to surface ahead of that reveal, though none of the specifications are official until Samsung makes a formal announcement.