Polar H9
Score: 83/100
Suunto Chest Strap
Score: 87/100Rankings
The Suunto Smart Heart Rate Belt is a chest-strap monitor offering ECG-grade accuracy and an industry-leading 500-hour battery life. Its main trade-offs are a short 3-meter transmission range and the lack of an on-strap display. Best suited for multisport athletes who already use Suunto devices.
The Polar H9 is a chest-mounted ECG heart-rate sensor offering exceptional accuracy and a 400-hour battery life. Its main trade-off is the lack of onboard storage and reliance on a replace-once coin cell battery. Ideal for athletes who need precise data across multiple sports and appreciate dual-protocol connectivity.
| Attribute | | |
|---|---|---|
400 hours | 500 hoursbest | |
| ↓ lower better | 60 g | 40.6 gbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Battery & Power(2) | ||
Battery Life (hours) | 400 hours | 500 hours |
Battery Type | CR 2025 | CR2025 |
Build & Design(3) | ||
Weight (g) | 60 g | 40.6 g |
Water Resistance (IP Rating) | IP68 | 30m |
Strap Material | Polyamide/Polyurethane/Elastane/Polyester | Polyamide/elastane |
Connectivity(1) | ||
Bluetooth Version | Bluetooth LE | BLE |
General(1) | ||
Operating Temperature (°C) | -10 to 50 °C | -20 to 60 °C |
Products in the top-left offer the best value (high score, low price).
Editors and CrossFit-focused reviewers consider the Polar H9 the best-value chest strap, emphasizing its precise ECG tracking, dual-protocol connectivity, and underwater capability.
Professional reviewers praise the belt for its ECG-based accuracy, lightweight construction, and seamless integration with Suunto's ecosystem, noting that it delivers performance-level precision for multisport athletes.
