OnePlus Watch 4 Leak Reveals Big Battery, WearOS Upgrade and Possible Oppo Rebrand Twist

OnePlus hasn’t officially said a word yet… but the Watch 4 is already out there in leaks, and honestly, it’s revealing almost everything before launch.

The smartwatch has now shown up on certification sites and even retail packaging leaks, hinting that OnePlus is getting ready to bring it soon. And from what’s coming out, this isn’t just a small upgrade — it’s more like a quiet rebuild.

First, the basics.

The OnePlus Watch 4 (model OPWWE261) is expected to run on WearOS 5.0, which is a big shift if you’ve followed OnePlus watches before. Earlier models didn’t fully lean into WearOS, so this alone changes how the watch might feel in daily use — better app support, smoother integration, more “smartwatch” than “fitness band”.

Now the hardware side gets interesting.

Leaks suggest a 646mAh battery, which is quite big for a smartwatch. If optimized well, this could easily outperform most WearOS watches in battery life — something that’s usually a weak spot in this category. Along with that, it may pack 2GB RAM and a 466×466 display, likely around 1.5 inches. That puts it right in line with premium smartwatch standards.

And then comes the twist.

There’s strong indication this might actually be a rebranded OPPO Watch X3. The specs, design hints, even internal hardware all point in that direction. Not surprising though — OnePlus and OPPO have been sharing tech more openly in recent years.

If that’s true, then expect features like ECG, heart rate tracking, wrist temperature monitoring, eSIM support, and a durable titanium build. Basically, OnePlus isn’t going basic here — it’s aiming for a full premium smartwatch experience.

The retail box leak adds a few small but important details.

It confirms Android 9.0+ compatibility and suggests 10W charging support, which could make charging noticeably faster than previous models. Also, production reportedly started in March 2026, which usually means launch isn’t far off now.

Colors like Evergreen Titanium and Black are expected — so OnePlus is keeping that clean, minimal design language intact.

Pricing is still unclear, but if it really mirrors the OPPO Watch X3, expect something around the premium range — not budget, not mid-tier.

Right now, OnePlus is busy teasing its Pad 4 launch in India, but this watch might quietly follow right after.

And if all these leaks hold true… this could finally be the OnePlus smartwatch that actually competes properly in the WearOS space, not just sits on the side.

Anubhav Chauhan

Anubhav Chauhan is a passionate technology writer at NewzTechy.com, where he focuses on delivering the latest updates and insights from the fast-moving world of tech. With a keen interest in emerging technologies, gadgets, and digital trends, he enjoys breaking down complex topics into simple, easy-to-understand content for everyday readers. Anubhav believes that technology should be accessible to everyone, and through his writing, he aims to keep readers informed, aware, and ahead of the curve. Whether it’s new innovations, software updates, or industry developments, he is always eager to explore and share valuable information with his audience.