DIY guide to change battery : Garmin HRM Tri / Run / Swim Chest Strap - YouTube
thegearlife - Garmin HRM-tri In-Depth Review
Garmin HRM-Pro Battery Replacement - YouTube
thegearlife - Garmin HRM-tri In-Depth Review
Support: Changing the battery on an HRM-Pro™ Plus Heart Rate Monitor - YouTube
HRM-Pro Plus Owners Manual - Replacing the Heart Rate Monitor Battery
HRM-Swim™ | Garmin
Garmin HRM-TRI & HRM-SWIM In-Depth Review | DC Rainmaker
Garmin HRM-PRO Heart Rate Strap In-Depth Review
Garmin Fenix 3 - Garmin: Replacing the Battery in your Heart Rate Monitor ( HRM) The CR2032 batteries in your HRM-Run, HRM-Swim or HRM-Tri straps will last approximately 18 months, depending on use.
Garmin HRM-TRI & HRM-SWIM In-Depth Review | DC Rainmaker
Battery Replacement Instructions for Premium Feature HRM Straps | Garmin Customer Support
thegearlife - Garmin HRM-tri In-Depth Review
Support - Changing the battery on a Garmin Heart Rate Monitor - YouTube
Replacing the Battery on the Garmin Premium Heart Rate Monitor | Garmin Customer Support