Replacing the Speed Sensor or Cadence Sensor Battery
The LED flashes red to indicate a low battery level after two revolutions.
Locate the circular battery cover on the back of the sensor.
- Twist the cover counter-clockwise until the marker points to unlocked and the cover is loose enough to remove.
Remove the cover and the battery .
TIP: You can use a piece of tape or a magnet to remove the battery from the cover.
- Wait 30 seconds.
Insert the new battery into the cover, observing polarity.
NOTE: Do not damage or lose the O-ring gasket.
Twist the cover clockwise until the marker points to locked.
NOTE: The LED flashes red and green for a few seconds after battery replacement. When the LED flashes green and then stops flashing, the device is active and ready to send data.