Samsung rejected 7,000mAh Galaxy S27 Ultra battery to keep S Pen

Samsung reportedly tested a massive 7,000mAh battery for the upcoming Galaxy S27 Ultra but ultimately rejected the configuration for the retail device. The move indicates a tension between the company's desire for industry-leading endurance and its commitment to the Ultra's signature hardware features.

According to reports, the 7,000mAh prototype required the removal of the integrated S Pen to make room for the larger cell. While the high-capacity experiment was discarded, Samsung is now rumored to be targeting a retail battery capacity between 5,700mAh and 6,000mAh. To achieve this increase without drastically altering the phone's physical footprint, Samsung is expected to utilize silicon-carbon anode battery technology, a move that follows the technology's debut in the Galaxy Z Fold 8.

A half-decade of stagnation

Since the launch of the Galaxy S20 Ultra in 2020, Samsung has maintained a consistent 5,000mAh battery capacity across its flagship Ultra lineup. This stability has left the South Korean giant at a competitive disadvantage against Chinese manufacturers such as Xiaomi, Oppo, and Vivo, many of whom have already pushed flagship capacities beyond 6,000mAh and even 7,000mAh. Industry analysts often attribute Samsung's conservative approach to the lasting reputational damage caused by the Galaxy Note 7 battery failures in 2016, which forced the company to prioritize safety and stability over raw capacity.

Closing the battery gap

If Samsung delivers a 6,000mAh cell in the S27 Ultra, it would mark the first significant capacity increase for the Ultra series in over five years. The fact that Samsung was willing to experiment with a 7,000mAh cell—even if it was ultimately deemed impractical—suggests a strategic shift toward closing the "battery gap" with global rivals. However, the rejection of that prototype confirms that the S Pen remains a non-negotiable component of the Ultra's identity, as the company is unwilling to sacrifice the stylus for the sake of maximum runtime.

What to watch

While the shift toward silicon-carbon anodes provides a path to higher density, the final retail capacity remains unconfirmed. Observers will be watching to see if Samsung can hit the 6,000mAh mark while maintaining the device's slim profile and S Pen functionality. Further details on the S27 Ultra's final specifications are expected as the device nears its official reveal.