The upcoming Vivo X300 and X300 Pro are set to redefine flagship endurance, with official-looking leaks confirming battery capacities that leave even the top-tier Vivo X200 Ultra in the dust.
In a highly anticipated move, Vivo is preparing to unveil the Vivo X300 and Vivo X300 Pro in China before the month concludes. As previously confirmed, these devices will be among the very first to harness the raw power of MediaTek's cutting-edge Dimensity 9500 chipset, placing them in direct competition with the similarly-timed Oppo Find X9 series.
While the processor has been the headline act, new leaks have now shifted significant attention to what powers these beasts. According to reliable sources, including detailed insights from the leaker New Evaluation Technology on Weibo, the battery specifications for both models have been revealed, and they represent a substantial generational leap.
Power That Outshines Its Predecessor
The standard Vivo X300 is reported to be equipped with a robust 6,040 mAh battery, a clear step up from its predecessors. Not to be outdone, the Vivo X300 Pro is slated to feature an even more impressive 6,510 mAh power cell.
The leak, which originated from a detailed post on Weibo, confirms that both capacities comfortably surpass the batteries found in the entire Vivo X200 lineup, including the premium Vivo X200 Ultra. This strategic move signals Vivo's intense focus on all-day, and then some, battery life as a core tenet of its flagship experience.
A Charged-Up Competition
While Vivo's new batteries are formidable, they don't quite chase the extreme capacities of the recently launched Xiaomi 17 series, which boasts cells ranging from 6,300 mAh to a staggering 7,500 mAh. However, Vivo's offering strikes a compelling balance between high capacity and sleek device design.
Both the X300 and X300 Pro will support 90W wired charging, ensuring that topping up these large batteries is a swift affair. This combination of high capacity and fast charging makes a mockery of the conservative approach seen in rivals like Samsung's Galaxy S25 series, where the top-tier Galaxy S25 Ultra maxes out at a mere 5,000 mAh.
More Than Just a Powerhouse
The excitement around these devices isn't confined to their endurance. Early performance benchmarks and tests shared by industry insiders suggest the Dimensity 9500 chipset, paired with Vivo's software optimization, is creating a truly elite performance package. This positions the X300 series not just as battery champions, but as all-around performance powerhouses.
For those considering the competition, it's worth noting that the Samsung Galaxy S25 Ultra is currently available on platforms like Amazon, but with significantly smaller batteries, the value proposition of the upcoming Vivo duo becomes increasingly clear.
A Word of Caution for Eager Buyers
Despite the very promising leaked specifications, it's always wise to wait for comprehensive independent reviews before passing final judgment on real-world battery life. As we've seen with devices like the Galaxy Z Fold7, software optimization and component efficiency can sometimes deliver battery life that far exceeds—or disappoints—what the raw mAh numbers suggest.
One thing is certain: with the official Vivo Weibo account already building hype for the launch, the confirmation of these massive batteries sets the stage for the Vivo X300 and X300 Pro to be two of the most compelling and enduring flagship smartphones of the year.
Stay tuned for our full hands-on review and battery test results once the devices are officially unveiled.
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