Caring for the Heart Rate Monitor
NOTICE
You must unsnap and remove the module before washing the strap.
A build up of sweat and salt on the strap can decrease the ability of the heart rate monitor to report accurate
data.
• Go to www.garmin.com/HRMcare for detailed washing instructions.
• Rinse the strap after every use.
• Machine wash the strap after every seven uses.
• Do not put the strap in a dryer.
• When drying the strap, hang it up or lay it flat.
• To prolong the life of your heart rate monitor, unsnap the module when not in use.
User Replaceable Batteries
WARNING
See the Important Safety and Product Information guide in the product box for product warnings and other
important information.
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.
2 Remove the cover and battery.
3 Wait 30 seconds.
4 Insert the new battery with the positive side facing up.
NOTE: Do not damage or lose the O-ring gasket.
5 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.
56 Device Information