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OnePlus has introduced its latest flagship smartwatch, the OnePlus Watch 3, in Europe and North America. The device builds on the strengths of its predecessor, offering improved battery life, advanced health monitoring, and enhanced fitness tracking capabilities. Powered by Wear OS 5 by Google, the OnePlus Watch 3 is designed to cater to users seeking a reliable and feature-rich wearable device.
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Key Features of the OnePlus Watch 3
The OnePlus Watch 3 comes with several notable upgrades, including extended battery life, new health monitoring tools, and improved fitness tracking accuracy. It is available in two colour options: Emerald Titanium and Obsidian Titanium. The watch features a premium design with durable materials such as a stainless-steel body, titanium PVD bezel, and a 2D sapphire crystal display.
Battery Life and Performance
One of the standout features of the OnePlus Watch 3 is its impressive battery life. The device offers up to 16 days of usage in power-saving mode, five days in smart mode, and three days in heavy-use mode. This is made possible by a combination of factors, including a larger 631mAh battery and the OnePlus Silicon NanoStack Battery technology, which enhances energy density.
The watch is equipped with the BES2800 chipset, built on a 6nm FinFET process, which improves CPU performance and reduces power consumption. Additionally, the Dual-Engine Architecture, powered by the Snapdragon W5 performance chipset and the BES2800 efficiency chipset, ensures seamless operation and optimal power management. This architecture allows the watch to switch between Wear OS and RTOS, balancing performance and battery efficiency.
Health Monitoring Capabilities

The OnePlus Watch 3 introduces several new health monitoring features, including the 60s Health Check-In. This tool provides a quick assessment of key health metrics such as heart rate, blood oxygen levels (SpO2), ECG, vascular health, wrist temperature, sleep quality, and mental well-being. The watch also includes an enhanced photoplethysmography (PPG) sensor with an eight-channel heart rate sensor for improved accuracy.
The ECG feature can detect atrial fibrillation, sinus rhythm, and other heart rate abnormalities, offering users valuable insights into their cardiovascular health. Additionally, the watch assesses vascular health by measuring arterial stiffness, providing users with age-based benchmarks for comparison.
For mental well-being, the 360 Mind and Body feature analyses data such as heart rate variability (HRV), resting heart rate, and activity intensity to deliver a comprehensive assessment of emotional and stress levels. The watch also recommends breathing exercises to help users manage stress effectively.
Enhanced Fitness Tracking
The OnePlus Watch 3 is equipped with a dual-frequency GPS chip, which ensures faster and more accurate tracking of outdoor activities such as running. The device supports over 100 sports modes, including running, cycling, swimming, and yoga, catering to a wide range of fitness enthusiasts.
The watch provides detailed insights into workout intensity, fat-burning efficiency, and exercise effectiveness. It also evaluates fat and carbohydrate consumption during exercise, helping users optimise their workouts for better results.
Seamless Integration with Wear OS 5
Running on Wear OS 5, the OnePlus Watch 3 offers seamless integration with essential Google apps. Users can sync their Gmail accounts, reply to emails directly from the watch, and store boarding passes in Google Wallet for convenient travel. The watch also supports remote control of OnePlus smartphones, allowing users to play videos and control the phone’s camera.
Premium Design and Durability
The OnePlus Watch 3 features a sleek, round design with a 1.5-inch LTPO flexible display. The watch is built to military-grade standards (MIL-STD-810H) and has an IP68 rating for water and dust resistance. It is also 5ATM rated, making it suitable for swimming and other water-based activities.
A redesigned rotating crown enhances user interaction, providing a smooth and intuitive way to navigate the watch’s functions.
Pricing and Availability
The OnePlus Watch 3 is priced at £319 and is available for purchase in Europe and North America through OnePlus.com. Warranty plans and after-sales programs vary by region.
Disclaimers and Additional Information
- Battery life claims are based on laboratory tests and may vary depending on usage.
- The 60s Health Check-In feature (without ECG) will be available via an over-the-air (OTA) update in March 2025.
- ECG functionality is subject to regional availability and regulatory approvals.
- The watch is compatible with Android smartphones running Android 9.0 and above. iOS devices are not supported.
- Water resistance is rated at 50 meters under ISO standard 22810:2010, but the watch is not suitable for activities such as diving or hot water showers.
The OnePlus Watch 3 represents a significant step forward in wearable technology, combining advanced health and fitness features with a premium design and long-lasting battery life. It is a versatile companion for users looking to monitor their health, track their fitness, and stay connected on the go.

I am James, a UK-based tech enthusiast and the Editor and Owner of Mighty Gadget, which I’ve proudly run since 2007. Passionate about all things technology, my expertise spans from computers and networking to mobile, wearables, and smart home devices.
As a fitness fanatic who loves running and cycling, I also have a keen interest in fitness-related technology, and I take every opportunity to cover this niche on my blog. My diverse interests allow me to bring a unique perspective to tech blogging, merging lifestyle, fitness, and the latest tech trends.
In my academic pursuits, I earned a BSc in Information Systems Design from UCLAN, before advancing my learning with a Master’s Degree in Computing. This advanced study also included Cisco CCNA accreditation, further demonstrating my commitment to understanding and staying ahead of the technology curve.
I’m proud to share that Vuelio has consistently ranked Mighty Gadget as one of the top technology blogs in the UK. With my dedication to technology and drive to share my insights, I aim to continue providing my readers with engaging and informative content.