← Back to Smartwatches
2026 comparison
Updated Jan 7, 2026
|Sources: Amazon, ManufacturerGarmin epix Pro (Gen 2) Sapphire Edition (47mm) vs OnePlus Watch 2
If you want a robust outdoor smartwatch, the Garmin epix Pro (Gen 2) Sapphire Edition (47mm) wins with its premium build and 16-day battery life. In contrast, the OnePlus Watch 2 offers groundbreaking 100-hour battery life but sacrifices some features that serious adventurers might need. The key differentiator here is durability and functionality. The Garmin is built for tough conditions with a MIL-STD-810H rating, while the OnePlus Watch 2 shines in everyday use with its lightweight design. In real-world use, you'll find the Garmin's GPS precision and longer battery useful for extended adventures, while the OnePlus focuses more on smart features and daily usability.
⚖️ Weight: 2.47 oz vs 1.73 oz🔋 Battery: 16 days vs 100 hours🏋️ Workout Modes: 80+ vs 100+
As an Amazon Associate I earn from qualifying purchases.
Garmin epix Pro (Gen 2) Sapphire Edition (47mm)
★4.7
(1,201)•Amazon
Compatibility:iPhone, Android (Garmin Connect app required)
Operating System:Garmin OS (Proprietary)
Case Size:47 x 47 x 14.5 mm
Case Material:Fiber-reinforced polymer with titanium rear cover; Titanium bezel; Sapphire Crystal lens
Check Amazon Price→
OnePlus Watch 2
★4.6
(538)•Amazon
Compatibility:Android 8.0+ only (requires GMS 23.45.23+); iOS and Android Go edition NOT supported
Operating System:Wear OS 4 + RTOS (Dual-Engine Architecture)
Case Size:47mm (47.0 x 46.6 x 12.1 mm / 1.85 x 1.83 x 0.47 in)
Case Material:Chassis: Stainless steel; Bottom: Plastic (PC/PC+glass fiber); Cover: 2.5D Sapphire Crystal
Check Amazon Price→
Key spec differences
Only the specs that differ are shown here. Winners are highlighted when the data is clear.
Winner= clear advantage
Spec
Garmin epix Pro (Gen 2) Sapphire Edition (47mm)
OnePlus Watch 2
Display2 specs
Display SizeKey
Garmin epix Pro (Gen 2) Sapphire Edition (47mm)
1.3 in (33.0 mm) diameter
OnePlus Watch 2
1.43 in (3.63 cm)
Resolution
Garmin epix Pro (Gen 2) Sapphire Edition (47mm)
416 x 416 pixels
OnePlus Watch 2
466 x 466 pixels (326 ppi); 600 nits default brightness
Performance1 specs
Storage
Garmin epix Pro (Gen 2) Sapphire Edition (47mm)
32GB
OnePlus Watch 2
32 GB ROM + 2 GB RAM (Approx. 4GB reserved for RTOS)
Battery1 specs
Battery CapacityKey
Garmin epix Pro (Gen 2) Sapphire Edition (47mm)
Smartwatch mode: Up to 16 days (6 days always-on); GPS Only: Up to 42 hours (30 hours always-on); Expedition GPS: Up to 14 days
OnePlus Watch 2
500 mAh; Up to 100 hours (Smart Mode); Up to 48 hours (Heavy Use); Up to 12 days (Power Saver Mode)
Design2 specs
Weight
Garmin epix Pro (Gen 2) Sapphire Edition (47mm)
70 g (Case only: 47 g) — Titanium model
OnePlus Watch 2
49 g (Watch only) / 80 g (with Fluororubber strap)Winner
Water Resistance
Garmin epix Pro (Gen 2) Sapphire Edition (47mm)
10 ATM (water pressure equivalent to 100 meters)
OnePlus Watch 2
5 ATM (50 m) + IP68 (1.5m for 30 min)
Software1 specs
Operating System
Garmin epix Pro (Gen 2) Sapphire Edition (47mm)
Garmin OS (Proprietary)
OnePlus Watch 2
Wear OS 4 + RTOS (Dual-Engine Architecture)
Connectivity1 specs
Connectivity
Garmin epix Pro (Gen 2) Sapphire Edition (47mm)
Bluetooth; ANT+; Wi-Fi
OnePlus Watch 2
Bluetooth 5.0, Wi-Fi 2.4GHz/5GHz (802.11 a/b/g/n)
+Full specs, pros, and cons
Everything side-by-side with ratings and the full spec list.
Expand
Full specs, pros, and cons
Everything side-by-side with ratings and the full spec list.
Comparison: Garmin epix Pro (Gen 2) Sapphire Edition (47mm) vs OnePlus Watch 2
Garmin epix Pro (Gen 2) Sapphire Edition (47mm)
★4.7(1,201)Amazon
OnePlus Watch 2
★4.6(538)Amazon
| Criterion | Garmin epix Pro (Gen 2) Sapphire Edition (47mm) | OnePlus Watch 2 |
|---|---|---|
| Rating | ★4.7(1,201)Amazon | ★4.6(538)Amazon |
Compatibility | iPhone, Android (Garmin Connect app required) | Android 8.0+ only (requires GMS 23.45.23+); iOS and Android Go edition NOT supported |
Operating System | Garmin OS (Proprietary) | Wear OS 4 + RTOS (Dual-Engine Architecture) |
Case Size | 47 x 47 x 14.5 mm | 47mm (47.0 x 46.6 x 12.1 mm / 1.85 x 1.83 x 0.47 in) |
Case Material | Fiber-reinforced polymer with titanium rear cover; Titanium bezel; Sapphire Crystal lens | Chassis: Stainless steel; Bottom: Plastic (PC/PC+glass fiber); Cover: 2.5D Sapphire Crystal |
Display Type | AMOLED; Always-On Mode available | AMOLED touchscreen |
Display Size | 1.3 in (33.0 mm) diameter | 1.43 in (3.63 cm) |
Resolution | 416 x 416 pixels | 466 x 466 pixels (326 ppi); 600 nits default brightness |
Always On Display | Yes (optional) | Yes |
Water Resistance | 10 ATM (water pressure equivalent to 100 meters) | 5 ATM (50 m) + IP68 (1.5m for 30 min) |
Durability | MIL-STD-810H (Thermal, Shock, Water); Scratch-resistant Sapphire lens | MIL-STD-810H certified; Sapphire crystal face; Operating temp: -20°C to 55°C |
GPS | Multi-band GNSS with SatIQ technology; GPS, GLONASS, Galileo | Dual-frequency L1 + L5; Beidou, GPS, Galileo, GLONASS, QZSS |
Connectivity | Bluetooth; ANT+; Wi-Fi | Bluetooth 5.0, Wi-Fi 2.4GHz/5GHz (802.11 a/b/g/n) |
NFC Payments | Garmin Pay | Yes (Google Wallet) |
Sensors | Elevate Gen 5 optical heart rate sensor; Pulse Ox blood oxygen saturation monitor; Barometric altimeter; Compass; Gyroscope; Accelerometer; Thermometer; Ambient light sensor | Optical heart rate; optical pulse oximeter (SpO2); accelerometer; gyroscope; geomagnetic sensor; light sensor; barometer |
Health Features | ECG App (FDA cleared); Hill Score; Endurance Score; Jet Lag Adviser; Body Battery; Sleep Score; HRV Status; Health Snapshot; Pulse Ox | Sleep tracking (stages, score, snoring risk); OHealth breathing training; stress monitoring; heart rate (high/low alerts, resting); blood oxygen (SpO2) |
Workout Modes | Advanced Strength Training; HIIT; Running (Track, Trail, Ultra); Cycling (MTB, eBike); Skiing/Snowboarding; Surfing; Golf (43,000+ courses); Soccer; Tennis; and 80+ others | 100+ sports modes; 6 auto-detection modes (running, walking, cycling, swimming, rowing, elliptical); professional analysis for running, tennis, skiing |
Storage | 32GB | 32 GB ROM + 2 GB RAM (Approx. 4GB reserved for RTOS) |
Speaker Mic | None (Audio prompts via connected Bluetooth headphones only) | Yes (Built-in speaker and microphone) |
Calls | No (Can accept/decline calls to control phone; Android users can send text replies) | Yes (Bluetooth calling supported in Smart and Power Saver modes) |
Battery | Smartwatch mode: Up to 16 days (6 days always-on); GPS Only: Up to 42 hours (30 hours always-on); Expedition GPS: Up to 14 days | 500 mAh; Up to 100 hours (Smart Mode); Up to 48 hours (Heavy Use); Up to 12 days (Power Saver Mode) |
Charging | Garmin proprietary plug charger (clip-on data cable) | VOOC Fast Charging (7.5W); 100% in 60 mins; 1 day power in 10 mins |
Weight | 70 g (Case only: 47 g) — Titanium model | 49 g (Watch only) / 80 g (with Fluororubber strap) |
Band Sizes | Fits wrists 125–208mm (Silicone band included); QuickFit 22mm compatible | Fits wrist sizes 140–210 mm; standard 22 mm quick-release width |
Extras | Built-in LED Flashlight (Red/White strobes); Red Shift Mode (preserves night vision); Outdoor Maps+; Real-time Stamina; Morning Report | Dual-Engine architecture (Snapdragon W5 + BES2700); Google Play Store; Google Maps; Google Assistant; Flashlight; Compass; Media controls |
| Pros |
|
|
| Cons |
|
|
As an Amazon Associate I earn from qualifying purchases. | Check Price on Amazon→ | Check Price on Amazon→ |
Garmin epix Pro (Gen 2) Sapphire Edition (47mm)
Rating:★4.7(1,201)Amazon
Compatibility:iPhone, Android (Garmin Connect app required)
Operating System:Garmin OS (Proprietary)
Case Size:47 x 47 x 14.5 mm
Case Material:Fiber-reinforced polymer with titanium rear cover; Titanium bezel; Sapphire Crystal lens
Display Type:AMOLED; Always-On Mode available
Display Size:1.3 in (33.0 mm) diameter
Resolution:416 x 416 pixels
Always On Display:Yes (optional)
Water Resistance:10 ATM (water pressure equivalent to 100 meters)
Durability:MIL-STD-810H (Thermal, Shock, Water); Scratch-resistant Sapphire lens
GPS:Multi-band GNSS with SatIQ technology; GPS, GLONASS, Galileo
Connectivity:Bluetooth; ANT+; Wi-Fi
NFC Payments:Garmin Pay
Sensors:Elevate Gen 5 optical heart rate sensor; Pulse Ox blood oxygen saturation monitor; Barometric altimeter; Compass; Gyroscope; Accelerometer; Thermometer; Ambient light sensor
Health Features:ECG App (FDA cleared); Hill Score; Endurance Score; Jet Lag Adviser; Body Battery; Sleep Score; HRV Status; Health Snapshot; Pulse Ox
Workout Modes:Advanced Strength Training; HIIT; Running (Track, Trail, Ultra); Cycling (MTB, eBike); Skiing/Snowboarding; Surfing; Golf (43,000+ courses); Soccer; Tennis; and 80+ others
Storage:32GB
Speaker Mic:None (Audio prompts via connected Bluetooth headphones only)
Calls:No (Can accept/decline calls to control phone; Android users can send text replies)
Battery:Smartwatch mode: Up to 16 days (6 days always-on); GPS Only: Up to 42 hours (30 hours always-on); Expedition GPS: Up to 14 days
Charging:Garmin proprietary plug charger (clip-on data cable)
Weight:70 g (Case only: 47 g) — Titanium model
Band Sizes:Fits wrists 125–208mm (Silicone band included); QuickFit 22mm compatible
Extras:Built-in LED Flashlight (Red/White strobes); Red Shift Mode (preserves night vision); Outdoor Maps+; Real-time Stamina; Morning Report
✓ Pros:
- • Premium Sapphire and Titanium build is lightweight yet durable
- • Built-in LED flashlight is incredibly useful for night training
- • Elevate Gen 5 sensor enables ECG and improved tracking accuracy
- • Excellent battery life (16 days) despite the bright AMOLED screen
- • Multi-band GPS with SatIQ offers top-tier location precision
✗ Cons:
- • Lacks the microphone and speaker found in the newer Fenix 8
- • No LTE/Cellular option (phone required for data/safety features)
- • Significant price premium over standard non-Sapphire models
- • Proprietary charging cable is less convenient than wireless options
As an Amazon Associate I earn from qualifying purchases.
Check Price on Amazon→
OnePlus Watch 2
Rating:★4.6(538)Amazon
Compatibility:Android 8.0+ only (requires GMS 23.45.23+); iOS and Android Go edition NOT supported
Operating System:Wear OS 4 + RTOS (Dual-Engine Architecture)
Case Size:47mm (47.0 x 46.6 x 12.1 mm / 1.85 x 1.83 x 0.47 in)
Case Material:Chassis: Stainless steel; Bottom: Plastic (PC/PC+glass fiber); Cover: 2.5D Sapphire Crystal
Display Type:AMOLED touchscreen
Display Size:1.43 in (3.63 cm)
Resolution:466 x 466 pixels (326 ppi); 600 nits default brightness
Always On Display:Yes
Water Resistance:5 ATM (50 m) + IP68 (1.5m for 30 min)
Durability:MIL-STD-810H certified; Sapphire crystal face; Operating temp: -20°C to 55°C
GPS:Dual-frequency L1 + L5; Beidou, GPS, Galileo, GLONASS, QZSS
Connectivity:Bluetooth 5.0, Wi-Fi 2.4GHz/5GHz (802.11 a/b/g/n)
NFC Payments:Yes (Google Wallet)
Sensors:Optical heart rate; optical pulse oximeter (SpO2); accelerometer; gyroscope; geomagnetic sensor; light sensor; barometer
Health Features:Sleep tracking (stages, score, snoring risk); OHealth breathing training; stress monitoring; heart rate (high/low alerts, resting); blood oxygen (SpO2)
Workout Modes:100+ sports modes; 6 auto-detection modes (running, walking, cycling, swimming, rowing, elliptical); professional analysis for running, tennis, skiing
Storage:32 GB ROM + 2 GB RAM (Approx. 4GB reserved for RTOS)
Speaker Mic:Yes (Built-in speaker and microphone)
Calls:Yes (Bluetooth calling supported in Smart and Power Saver modes)
Battery:500 mAh; Up to 100 hours (Smart Mode); Up to 48 hours (Heavy Use); Up to 12 days (Power Saver Mode)
Charging:VOOC Fast Charging (7.5W); 100% in 60 mins; 1 day power in 10 mins
Weight:49 g (Watch only) / 80 g (with Fluororubber strap)
Band Sizes:Fits wrist sizes 140–210 mm; standard 22 mm quick-release width
Extras:Dual-Engine architecture (Snapdragon W5 + BES2700); Google Play Store; Google Maps; Google Assistant; Flashlight; Compass; Media controls
✓ Pros:
- • Groundbreaking 100-hour battery life for a full-featured Wear OS watch
- • Premium build with stainless steel chassis and sapphire crystal standard
- • Dual-frequency GPS (L1+L5) ensures high accuracy in urban environments
- • Fast charging provides a full day's power in just 10 minutes
- • Fluid performance via Snapdragon W5 Gen 1 processor
✗ Cons:
- • Available in only one large size (47mm), which may not fit small wrists
- • No LTE/Cellular option available
- • Strictly incompatible with iOS (iPhone)
- • Crown rotates but does not function for scrolling menus
As an Amazon Associate I earn from qualifying purchases.
Check Price on Amazon→
Which one is better?
The Garmin epix Pro (Gen 2) Sapphire Edition (47mm) is the better buy for most people - its 16-day battery life crushes the OnePlus Watch 2's 100-hour limit when it comes to outdoor activities. That said, grab the OnePlus Watch 2 if you prioritize smart features and a lighter design - it's lighter, making it more comfortable for daily wear.
Who should buy each?
Choose the Garmin epix Pro (Gen 2) Sapphire Edition (47mm) if: you need 16+ days of battery life, you often train outdoors, or you require top-tier GPS accuracy.
Choose the OnePlus Watch 2 if: you want a stylish smartwatch for everyday use, you need features like Bluetooth calling, or you prefer a lightweight design with fast charging. (1.73 oz weight)
Conclusion
Garmin epix Pro (Gen 2) Sapphire Edition (47mm) and OnePlus Watch 2 are both solid choices. Match the strengths above to your budget and workflow to make the best call.
Frequently Asked Questions
+Which has better value?
Garmin epix Pro (Gen 2) Sapphire Edition (47mm) excels if you value premium sapphire and titanium build is lightweight yet durable. OnePlus Watch 2 is better if you prioritize groundbreaking 100-hour battery life for a full-featured wear os watch. Pick based on your budget and daily use.
+Is this an independent review?
Yes. We use affiliate links for monetization, but recommendations are research-driven and unbiased.
+Do newer models exist?
Check release timelines from the manufacturers and compare pricing before you buy. We refresh this page when major updates land.
Affiliate disclosure
PageBen uses Amazon affiliate links. If you purchase through our links, we may earn a commission at no extra cost to you. This supports independent content for US shoppers.