OnePlus Watch 3 (43mm)

Quick Facts

Item	Details
Launch Year	2025
Case Material	Stainless Steel
Available Sizes	43mm
Display	1.32-inch LTPO AMOLED, Sapphire Crystal
Processor	Qualcomm Snapdragon W5 Gen 1 + BES2800BP MCU
Connectivity	Bluetooth
Battery Life	Up to 60 hours (Smart Mode), up to 7 days (Power Saver Mode)
Water Resistance	5ATM + IP68
Health Features	Heart Rate, Blood Oxygen (SpO₂), ECG, Wrist Temperature, Sleep Tracking, Stress Monitoring, 60-second Health Check
Storage	2GB RAM + 32GB Storage
Weight	Approx. 37.8g (without strap)
Compatibility	Android 9.0 or later

Overview

The OnePlus Watch 3 (43mm) is a compact version of the OnePlus Watch 3, designed for users who prefer a smaller and lighter smartwatch without sacrificing flagship features. It combines Wear OS, premium materials and advanced health tracking in a comfortable 43mm case that’s ideal for smaller wrists.

Powered by the Snapdragon W5 Gen 1 processor and BES2800BP co-processor, it features a vibrant LTPO AMOLED display, dual-frequency GPS, up to 60 hours of battery life in Smart Mode, 5ATM water resistance and comprehensive health monitoring. When buying a used OnePlus Watch 3 (43mm), check the battery condition, display, buttons, charging contacts and Google account status before making your purchase.

Key Highlights

1. Compact & Lightweight Design

The 43mm case is designed for users who prefer a smaller smartwatch that’s comfortable to wear all day.

Why it matters

Fits smaller wrists better
Lightweight and comfortable
Premium stainless steel construction

2. Full Wear OS Experience

Enjoy Google’s Wear OS platform with access to popular apps and smart features.

Why it matters

Google Maps and Google Wallet
Google Play Store
Google Assistant support

3. Comprehensive Health Tracking

Monitor your daily wellness with OnePlus’ latest health features.

Why it matters

ECG and Blood Oxygen monitoring
Wrist temperature tracking
60-second Health Check

Key Features Explained

Feature	Specification	Why It Matters
Display	1.32-inch LTPO AMOLED with Sapphire Crystal	Bright, smooth and durable display
Processor	Snapdragon W5 Gen 1 + BES2800BP MCU	Fast Wear OS performance with excellent efficiency
Battery Life	Up to 60 hours (7 days Power Saver Mode)	Reliable multi-day battery life
Charging	VOOC Fast Charging	Around 10 minutes of charging provides approximately one day of use
Water Resistance	5ATM + IP68	Suitable for swimming and everyday activities
GPS	Dual-Frequency GPS	Accurate navigation and workout tracking
Connectivity	Bluetooth	Seamlessly connects with Android smartphones
Health Features	Heart Rate, ECG, SpO₂, Temperature, Sleep Tracking, 60-second Health Check	Comprehensive health monitoring
Compatibility	Android 9.0 or later	Supports Wear OS and Google services

Bluetooth Connectivity

The OnePlus Watch 3 (43mm) connects to your smartphone via Bluetooth.

Once connected, you can:

Receive calls and notifications
Reply to supported messages
Control music playback
Use Google Maps navigation
Download apps from Google Play

The OnePlus Watch 3 (43mm) supports Bluetooth calling but does not support standalone eSIM connectivity.

Compare the Related Models

Feature	OnePlus Watch 2	OnePlus Watch 3 (43mm)	OnePlus Watch 3 (46mm)	OPPO Watch X2
Launch Year	2024	2025	2025	2025
Display	1.43” AMOLED	1.32” LTPO AMOLED	1.5” LTPO AMOLED	1.5” LTPO AMOLED
Processor	Snapdragon W5 Gen 1	Snapdragon W5 Gen 1	Snapdragon W5 Gen 1	Snapdragon W5 Gen 1
Battery Life	Up to 100 hrs	Up to 60 hrs	Up to 5 days	Up to 5 days
Storage	32GB	32GB	32GB	32GB
Water Resistance	5ATM + IP68	5ATM + IP68	5ATM + IP68	5ATM + IP68
GPS	Dual-Frequency GPS	Dual-Frequency GPS	Dual-Frequency GPS	Dual-Frequency GPS
Connectivity	Bluetooth	Bluetooth	Bluetooth	Bluetooth
Weight	49g	37.8g	49.7g	49.7g

Which OnePlus Watch Should You Choose?

Model	Recommended For
OnePlus Watch 3 (43mm)	Buyers who prefer a lightweight smartwatch for smaller wrists.
OnePlus Watch 3 (46mm)	Buyers who want a larger display and longer battery life.
OnePlus Watch 2	Buyers looking for excellent value with similar Wear OS features.
OPPO Watch X2	Buyers who prefer OPPO’s smartwatch ecosystem.

Alternatives to OnePlus Watch 3 (43mm)

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Common Questions

Is the OnePlus Watch 3 (43mm) worth buying?

Yes. The OnePlus Watch 3 (43mm) is an excellent option for buyers who want flagship Wear OS features in a smaller, lighter smartwatch. It offers premium build quality, advanced health tracking and solid battery life in a compact design.

What is the difference between the OnePlus Watch 3 (43mm) and OnePlus Watch 3 (46mm)?

The 43mm model is lighter and more comfortable for smaller wrists, while the 46mm model offers a larger display and longer battery life. Both models share the same Wear OS platform, processor and health tracking features.

Is the OnePlus Watch 3 (43mm) waterproof?

The OnePlus Watch 3 (43mm) is rated 5ATM + IP68, making it suitable for swimming, showers and everyday water exposure. It is not designed for scuba diving or high-pressure water sports.

Should I buy the OnePlus Watch 3 (43mm) or Google Pixel Watch 3?

Choose the OnePlus Watch 3 (43mm) if you want longer battery life and a classic round smartwatch design. Choose the Google Pixel Watch 3 if you prefer Fitbit health tracking and deeper integration with Google’s Pixel ecosystem.

Why Buy the OnePlus Watch 3 (43mm)?

The OnePlus Watch 3 (43mm) combines flagship Wear OS features, premium materials and advanced health tracking in a compact, lightweight smartwatch. It’s an excellent choice for Android users who want the full smartwatch experience without the bulk of a larger watch. Compare OnePlus Watch 3 (43mm) listings on SellUp Marketplace to find the condition and price that best suit your budget.