Replacing the HRM-Dual Battery

1. Use the included screwdriver (Torx T5) to remove the four screws on the back of the module.

NOTE: HRM-Dual accessories produced before September 2020 use Phillips #00 screws.

1. Remove the cover and battery.

1. Wait 30 seconds.
2. Insert the new battery with the positive side facing up.

NOTE: Do not damage or lose the O-ring gasket.

1. Replace the back cover and the four screws.

NOTE: Do not overtighten.

After you replace the heart rate monitor battery, you may need to pair it with the device again.