Replacing the HRM-Dual Battery 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.. Page 1 Steps to Replace the Battery on an HRM- Run, HRM-Swim, or HRM-Tri Strap To change the coin-cell battery on your HRM-Run, HRM-Swim, or HRM-Tri strap, you will need the following: CR2032 coin cell battery Small Phillips head screw driver This process will take about 5 minutes.; Page 2 My Chest Heart Rate Monitor Is Not Being Found by My Device If you are having difficulty pairing a Garmin.
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NOTE: The battery door must be flush with the heart rate monitor module. Rotate the battery door clockwise until the marker points to locked. Replace the sleeve.. Learn how to change the battery on your original "hard-strap" style Garmin Heart Rate Monitor.For more help, visit http://support.garmin.com