Support: Battery Replacement on a vívofit® jr. 2 - YouTube
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
vívofit jr. 3 - Replacing the Battery
Amazon.com: HQRP 4-Pack Battery Compatible with Garmin Vivofit, Vívofit-3 Bluetooth Fitness Band 010-01225-08 : Electronics
Garmin Vivofit Fitness Band Black Bluetooth DAMAGED BOX 753759119607 | eBay
vívofit Owner's Manual - Replacing the vívofit Device Batteries
How to Change Garmin Vivofit 4 Battery (and Hack Capacity to Make Longer-Lasting)! - YouTube
vívofit Owner's Manual - Replacing the vívofit Device Batteries
Garmin's new Vivofit 4 tracker still uses coin cell batteries : r/gadgets