OnePlus has finally lifted the curtain on the OnePlus 15R’s battery ahead of the phone’s official launch on December 17, where it will share the stage with the Pad Go 2 tablet and the Watch Lite. The company has confirmed that the 15R will ship with a huge 7,400 mAh battery, the largest cell ever fitted to a OnePlus device sold outside of China. Only the China-exclusive Ace 6T, with its 8,300 mAh pack, goes bigger, which is why some fans are already joking that they are still waiting for a phone with a battery that is literally “over 9000”. 
Even so, 7,400 mAh is miles beyond the 4,500–5,000 mAh range we see in most Android flagships today.
This massive capacity is paired with 80W SuperVOOC wired charging, so topping up should not feel painfully slow despite the bigger cell. OnePlus also claims that the battery is engineered to retain at least 80% of its original capacity after around four years of typical use, directly addressing the common fear that fast charging destroys long-term health. A key part of this promise lies in the chemistry: the 15R’s battery uses an anode with about 15% silicon content, allowing higher energy density, more stable performance and better longevity compared to conventional graphite-only designs.
Raw capacity is only one side of battery life, though. Under the hood, the OnePlus 15R runs on Qualcomm’s Snapdragon 8 Gen 5 chipset, a flagship-grade SoC that is built with both performance and efficiency in mind. Coupled with smart power management on the software side, the combination of a high-end chip and a large battery should translate into genuinely long screen-on times, not just glossy marketing numbers. Some early observers still see the 7,400 mAh figure as a small downgrade on paper compared with the Ace 6T, but taken in the context of global releases this is still one of the most aggressive battery specs you can get in a mainstream phone.
On the front, the 15R features an AMOLED display with a so-called “1.5K” resolution, sitting between classic Full HD+ and QHD+, and a silky-smooth 165Hz refresh rate. Peak brightness reaches up to 1,800 nits in High Brightness Mode, which should keep the screen legible outdoors without hammering the battery too hard. Gamers and heavy social-media scrollers are likely to appreciate this mix the most: a high refresh rate panel backed by a huge power pack means fewer compromises between animation smoothness and actually staying unplugged throughout the day.
OnePlus is also talking up its software extras. The OnePlus 15R will support the company’s Plus Mind features, designed to keep the phone feeling fast over time by learning usage patterns and intelligently tuning memory and background processes. There is also the Plus Key, a dedicated button that can be mapped to favorite shortcuts such as instantly opening the camera, launching a game, or triggering a specific mode with a single press. These touches, while smaller than the raw battery number, show that the 15R is intended to be a reliable daily driver that feels responsive long after the initial honeymoon period.
Put together, the OnePlus 15R is shaping up as a very battery-centric flagship for global markets. It may not reach the mythical “over 9000 mAh” capacity that meme-hungry users dream about, and spec purists will note that the Ace 6T still wins the capacity race in China. But for everyone else, a 7,400 mAh cell, 80W SuperVOOC charging, efficient Snapdragon 8 Gen 5 internals and a fast 165Hz AMOLED screen add up to a phone that promises to spend far more time in your hand than on the charger.