OnePlus has officially unveiled key battery and charging specifications for the upcoming OnePlus 15R, positioning it as a battery powerhouse in the mid-range segment with upgrades that surpass even its flagship sibling, the OnePlus 15. Set for a global launch on December 17, 2025, in Bengaluru, the 15R marks a significant evolution for the R-series, incorporating premium features like advanced Silicon Nanostack battery tech and 80W SUPERVOOC charging, as confirmed by the company in a recent press release.

At the heart of the OnePlus 15R is a massive 7,400 mAh battery—the largest ever in a globally available OnePlus smartphone—edging out the 7,300 mAh cell in the OnePlus 15 and dwarfing typical capacities in competing flagships like the Samsung Galaxy S25 Ultra. This dual-cell design leverages Silicon Nanostack technology, which integrates 15 percent silicon into the anode for higher energy density, enabling slimmer profiles without compromising endurance. OnePlus asserts the battery will retain at least 80 percent of its original capacity after four years of daily charging, addressing long-term degradation concerns through optimized charging algorithms and thermal management.

Complementing the robust battery is 80W SUPERVOOC wired charging via USB-C, promising rapid top-ups—potentially from zero to 100 percent in under 30 minutes based on similar OnePlus implementations—while maintaining safety features like Battery Health Engine to prevent overheating. Notably, the global 15R scales down from its Chinese counterpart, the OnePlus Ace 6T's 8,300 mAh battery and 100 W charging, likely to balance cost and thermal efficiency for international markets.

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Beyond power, the 15R integrates these enhancements with the Qualcomm Snapdragon 8 Gen 5 chipset—the first global phone to feature it—ensuring seamless performance without excessive drain. The company emphasizes this combo delivers "industry-leading endurance," ideal for heavy users in gaming, streaming, or multitasking.

The announcement has generated buzz, with early benchmarks suggesting the 15R could outpace predecessors in battery life tests, though full endurance figures await independent verification post-launch. Pricing and availability details, including variants up to 16GB RAM and 1TB storage, are expected at the event.

As OnePlus pushes the envelope on value-flagship battery tech, the 15R arrives at a time when consumers demand all-day-plus reliability, potentially setting a new benchmark for mid-premium devices starting around ₹49,999 in India.

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