3.7V 300mAh Li-ion Battery 361-0034-02 for Garmin Fenix 3, Fenix 3 Hr Smart Watch Battery - China for Garmin Fenix 3battery and Rechargeable Battery price | Made-in-China.com
Original Back Case For Garmin Fenix 3 Fenix 3 Hr Sport Smart Watch Back Cover Without Battery Housing Case Replacement Part - Smart Accessories - AliExpress
fēnix 3/HR - Replacing the Heart Rate Monitor Battery