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How do I change the battery to my heart rate sensor? | Polar USA
PolarGlobal on Twitter: "Today we've launched a new heart rate sensor: Polar H9! - Bluetooth, ANT+ and 5 kHz technologies - Battery life of 400 hours - Compatible with Polar Club Discover
Polar H1 Heart Rate Sensor With New Battery Installed (Without Chest Strap) EUC | eBay
Polar's New H9 Heart Rate Strap: Everything you ever wanted to know | DC Rainmaker