Garmin Vivofit review: Long battery life in a fitness band, no charger needed - CNET
Replacing the Batteries
Garmin Vivofit Battery Replacement Tutorial - Vivofit How To - 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