lipflip – Vivo is preparing to launch the Vivo X300 and X300 Pro in China before the end of October. Ahead of the official reveal, new details about the battery capacities and charging speeds of both models have surfaced. These smartphones will be among the first to use MediaTek’s advanced Dimensity 9500 chipset, joining the Oppo Find X9 and Find X9 Pro in early adoption.
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Leaked information from early influencer reviews, particularly by New Evaluation Technology, confirms significant battery upgrades. The Vivo X300 will house a 6,040 mAh battery, while the X300 Pro will increase that to 6,510 mAh. Both devices will support ultra-fast 90W wired charging, making them some of the fastest-charging phones in their category.
These battery capacities mark a clear upgrade from previous Vivo models. The X200 Ultra, one of Vivo’s premium flagships from earlier this year, featured a smaller battery. With this increase, Vivo seems focused on enhancing endurance without compromising design or performance.
While not quite reaching the scale of the Xiaomi 17 series—whose phones feature batteries up to 7,500 mAh—the Vivo X300 series still places itself ahead of major rivals. For comparison, Samsung’s Galaxy S25 Ultra carries only a 5,000 mAh battery and lacks the same charging speed, despite its premium pricing.
Charging Power and Real-World Use Remain to Be Tested
Battery size and charging speed numbers often tell only part of the story. Although the X300 and X300 Pro offer impressive figures on paper, real-world performance may vary. Fast charging at 90W will appeal to users seeking minimal downtime, but long-term efficiency and battery health are also critical.
MediaTek’s Dimensity 9500 chipset will likely play a key role in optimizing power consumption. Designed with high efficiency in mind, it may allow Vivo’s new flagships to extend battery life without needing further increases in size. Coupled with software-level battery optimization, users can expect all-day performance even with heavy use.
However, independent testing will be crucial to confirm these expectations. Past comparisons have shown that battery size does not always translate into longer use. For instance, the Galaxy Z Fold7 has matched rivals with larger batteries, such as the Honor Magic V5 and Vivo X Fold5, in real-world endurance.
With the X300 series, Vivo seems to be responding to growing demand for power-packed smartphones that charge quickly and last long. These early specs suggest serious competition for other flagship models arriving this fall.
As with all pre-release details, it’s wise to wait for independent reviews. Verified testing will clarify whether the Vivo X300 and X300 Pro truly deliver on battery life, charging speed, and thermal performance. Their success could set a new standard for balancing high performance with extended battery endurance in future smartphones.