Fitbit Charge 2
Score: 78/100
Polar H9
Score: 83/100Rankings
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.
The Fitbit Charge 2 delivers continuous PurePulse heart-rate monitoring, 4-day battery life, and water resistance up to 50 m, complemented by phone-connected GPS. Its limitations include a small tap-activated OLED display and lack of built-in GPS or SpO₂ monitoring. Ideal for users seeking a reliable, brand-trusted tracker for basic fitness and sleep tracking.
| Attribute | | |
|---|---|---|
— | 400 hoursbest | |
| ↓ lower better | 31.8 gbest | 60 g |
0.72 inbest | — |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Battery & Power(2) | ||
Battery Life (hours) | 4 days hours | 400 hours |
Battery Type | Lithium-polymer | CR 2025 |
Build & Design(2) | ||
Weight (g) | 31.8 g | 60 g |
Strap Material | Elastomer | Polyamide/Polyurethane/Elastane/Polyester |
Connectivity(1) | ||
Bluetooth Version | 4.0 | Bluetooth LE |
Products in the top-left offer the best value (high score, low price).
Professional reviewers commend the Charge 2 for its surprisingly accurate heart-rate tracking that aligns with chest-strap references, its comprehensive suite of fitness and sleep features, and its solid 4-day battery life.
Everyday users value the 24/7 heart-rate monitoring, comfortable small blue band, auto-sleep and exercise detection, and the long battery that minimizes charging.
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.
