OnePlus appears to be working on a device that solves the biggest downside of smaller smartphones: battery life. According to new reports circulating on Chinese social media, the upcoming OnePlus 15T will fit an enormous power cell into a relatively compact body, potentially outlasting even the largest flagships currently on the market. Beyond flagship upgrades, brands are also experimenting with new connectivity tools, such as the Infinix Note 60’s satellite calling feature announced ahead of CES 2026.
Small screen, high speed
The leak, which comes from the well-known tipster Digital Chat Station, claims the phone will stick to a 6.3-inch display. While this size is considered small by modern standards, the specs are premium. The screen is expected to be an LTPS panel with sharp 1.5K resolution.
Most notably, the refresh rate is tipped to hit 165Hz, making it significantly smoother than the 120Hz screen found on last year’s OnePlus 13T. The report also mentions a metal frame and a 3D ultrasonic fingerprint sensor, which usually offers faster and more reliable unlocking than optical versions.
A major jump in power
The standout feature is undoubtedly the battery. The report lists a 7,500mAh capacity for the OnePlus 15T. This is a massive upgrade over the 6,260mAh battery used in its predecessor.
It is rare to see such capacity in a phone this size. In fact, if the numbers hold true, this “compact” model would have a larger battery than the standard OnePlus 15 (7,300mAh) and the 15R (7,400mAh). This suggests OnePlus is using newer, high-density battery technology to pack more power into a smaller space.
Cameras and expected performance
Under the hood, the phone is expected to run on the Snapdragon 8 Elite Gen 5 chipset, ensuring top-tier performance. For photography, the leak points to a dual-camera system that includes a 50-megapixel Samsung JN5 telephoto lens, likely improving zoom shots compared to previous models.
Market Impact & Context
For years, buying a smaller phone meant accepting worse battery life. Physical space usually limits battery size. However, if OnePlus successfully puts a 7,500mAh cell in a 6.3-inch device, it breaks that rule.
This would make the OnePlus 15T a unique option for people who want a phone that is easy to hold but lasts multiple days on a charge. It puts pressure on rivals like Samsung and Google to improve the density of their own smaller devices.
What comes next
The previous model, the OnePlus 13T, launched in China in April. It is likely the new 15T will follow a similar schedule this spring. For international buyers, including those in India, this device often launches later under the name “OnePlus 15s.”
