Replacing the heart rate monitor battery.
Garmin 520 speed sensor battery.
A walkthrough of how to change the battery on a garmin speed sensor.
Replacing the speed sensor or cadence sensor battery the led flashes red to indicate a low battery level after two revolutions.
Cadence data from the cadence sensor is always recorded.
Speed sensor and cadence sensor specifications.
Pull the strap around the wheel hub and attach it to the hook on the sensor.
Battery type user replaceable cr2032 3 v battery life approximately 12 months 1 hour per day operating temperature range.
Garmin recommends you secure your bike on a stand while installing the sensor.
Cadence is your rate of pedaling or spinning measured by the number of revolutions of the crank arm per minute rpm.
Replacing the speed sensor or cadence sensor battery.
Caring for the heart rate monitor.
Locate the circular battery cover on the back of the sensor.
Place and hold the speed sensor on top of the wheel hub.
Speed sensor and cadence sensor specifications.
Caring for the heart rate monitor.
Replacing the heart rate monitor battery.
Replacing the speed sensor or cadence sensor battery.
Same method applies to any garmin sensor.