Battery Replacement Instructions for Premium Feature HRM Straps | Garmin Customer Support
Garmin Fitness - HRM-Pro transmits real-time heart rate data. It also tracks running dynamics that can help you improve your running form. And that makes this one impressive little strap. Shop now:
Garmin HRM-Tri Heart Rate Monitor Chest Strap Small and Lightweight Sport Fenix 753759108816 | eBay
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.