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How do I change the battery to my heart rate sensor?
Polar heart rate sensors Change the battery
Polar heart rate sensors Change the battery
DIY - Replace Battery on Polar F2 heart rate monitor
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Polar H9 is the ideal jack-of-all-trades heart rate sensor that connects to a large variety of devices. Thanks to Bluetooth, ANT+ and 5 kHz coded
Polar H9 Bluetooth, ANT+ and 5 kHz Coded Heart Rate Sensor