OnePlus’ next compact phone will outlast most big flagships thanks to its monsterous battery size

OnePlus 15T confirmed to feature a ridiculous 7,500mAh battery.

By Vikhyaat Vivek Published March 6, 2026

OnePlus 13T depicted in pink color. — OnePlus

In the past, smartphones with smaller form factors usually came with a couple of compromises, and battery life was often the first casualty. But OnePlus’ next palm-friendly flagship might just outlast most of your big premium devices.

Going big on battery and charging

The company has confirmed that the upcoming OnePlus 15T will pack a massive 7,500mAh battery, which dwarfs the cells found in tall phones like the Galaxy S26 Ultra. After confirming a major camera update, OnePlus China president Li Jie Louis revealed the battery and charging specs of this device.

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The details were shared in a post on the Chinese social media platform, Weibo. According to the executive, the OnePlus 15T will feature what the company calls a “Glacier Battery”, which is a silicon-carbon-based battery technology that is designed to pack higher capacity without making the device significantly thicker.

A big battery is only part of the story. The OnePlus 15T will also support 100W wired and 50W wireless fast charging, ensuring quick charging and shorter downtime. The giant battery is quite impressive considering the device is expected to sport a 6.3-inch display, similar to the Galaxy S26 and Pixel 10.

Compact size but big on features

Aside from the huge battery, this device will even offer flagship-level performance. It is expected to be equipped with Qualcomm’s Snapdragon 8 Elite Gen 5 SoC and will likely run on the Android 16 OS out of the box. Louis also confirmed a notable upgrade in design with the OnePlus 15T featuring IP66, IP68, IP69, and IP69K ratings for water and dust resistance. To recall, the OnePlus 13T only shipped with an IP65 rating for protection against the elements.

Vikhyaat Vivek is a tech journalist and reviewer with seven years of experience covering consumer hardware, with a focus on…

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