Amazon.com: Garmin vívofit 4 activity tracker with 1+ year battery life and color display. Small/Medium, Black. 010-01847-00, 0.61 inches : Sports & Outdoors
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Original Watch Battery 361-00108-00 For Garmin Vivoactive 3 Gps Sports Smart Watch Replacement Battery 200mah - Mobile Phone Batteries - AliExpress
Amazon.com: Garmin vivofit jr. 3, Fitness Tracker for Kids, Includes Interactive App Experience, Swim-Friendly, Up To 1-year Battery Life, Blue Stars : Sports & Outdoors
Support: Battery Replacement on a vívofit® jr. 2 - YouTube
vívofit jr. - Replacing the Battery
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Replacing the batteries in a Garmin Vivofit 4 - YouTube