OnePlus 15T: A Monstrous Battery of Over 7,000 mAh in a Compact Format?
While the OnePlus 15 has yet to be officially announced and the OnePlus 13T has just been released, early leaks about the OnePlus 15T (or OnePlus 15s, depending on the market) are already making headlines.
If these rumors hold true, the upcoming “compact” smartphone from the brand could set a benchmark for battery life.
OnePlus 15T: A Compact Design with a Giant Battery
Well-known leaker on Weibo, Smart Pikachu has shared some exciting new information about the OnePlus 15T. According to him, the smartphone would feature a 6.3-inch display—considered compact by today’s standards—while housing a battery exceeding 7,000 mAh, a technical marvel for a device of this size.
The phone is expected to be powered by the Snapdragon 8 Elite Gen 5, Qualcomm’s latest high-end processor, and will come with a metal chassis featuring a refined design.
Another notable new feature is the return of a multifunction button, which could be used for shortcuts to the camera or artificial intelligence tools.
This represents a significant upgrade from the OnePlus 13T, which already provided excellent battery life with its 6,260 mAh battery (5,850 mAh for the 13s version). With over 7,000 mAh, the 15T promises record-breaking battery endurance without sacrificing slimness or user comfort.
Next-Generation Battery Technology
According to Smart Pikachu, OnePlus would be utilizing a silicon carbide battery, a technology already tested by some manufacturers like Xiaomi. This allows for increased energy density without enlarging the battery size.
This innovation may explain how the brand is able to fit such a large battery into a compact design. For comparison, the Galaxy S25 Ultra comes with a 5,000 mAh battery, while the Xiaomi 17 has just crossed the symbolic threshold of 7,000 mAh.
The OnePlus 15T could therefore set a new record in the compact flagship category.
Ultrasonic Fingerprint Sensor and Premium Specifications
Another mentioned improvement is the addition of an ultrasonic fingerprint sensor embedded in the display, which is faster and more accurate than the current optical sensor found in the OnePlus 13 and 13T. Under the hood, the Snapdragon 8 Elite Gen 5 would ensure performance worthy of a true high-end device, suitable for gaming, photography, and generative AI.
Although the brand has yet to confirm anything, the OnePlus 15T might actually outshine the OnePlus 15 in terms of battery life—the latter is expected to come with a 7,300 mAh battery.
A New Champion of “Small” Smartphones?
In a market dominated by ever-larger displays, the OnePlus 15T could attract users nostalgic for compact formats. It would go head-to-head with the iPhone 17, the upcoming Galaxy S26 Pro, and the Pixel 10.
However, in one specific regard, it could surpass all these models: battery life. At a time when battery longevity has become a priority for many, this detail could make all the difference.
If Smart Pikachu’s information is confirmed, the OnePlus 15T looks to be one of the most balanced smartphones on the market—compact, powerful, enduring, and well-crafted. A battery of over 7,000 mAh in a 6.3-inch package, a Snapdragon 8 Elite Gen 5, and an ultrasonic sensor: this rare combination could delight performance enthusiasts without compromise.
It remains to be seen if OnePlus can maintain this level of innovation without increasing the phone’s weight… or its price.
