5 Pack - Battery Replacement for Garmin Vivofit Jr Activity Tracker Watch Junior | eBay
vívofit Owner's Manual - Replacing the vívofit Device Batteries
Buyr.com | Activity & Fitness Trackers | Garmin vivofit jr. 3, Fitness Tracker for Kids, Includes Interactive App Experience, Swim-Friendly, Up To 1-year Battery Life, Blue Stars
Garmin Vivofit 4: Replace the batteries! - YouTube
Replacing the batteries in a Garmin Vivofit 4 - YouTube
For GARMIN VIVOFIT JR.3 watch Battery HRM3-SS HRM-RU - AliExpress