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
Garmin Vivofit Battery Replacement Tutorial - Vivofit How To - YouTube
Amazon.com: HQRP 4-Pack Battery Compatible with Garmin Vivofit Vivofit-2 Activity Tracker Fitness Training Computer (2 Batteries fits Training Computer + 2 Batteries fits Heart-Rate Monitor) 010-01225-00 : Sports & Outdoors