vívofit Owner's Manual - Replacing the vívofit Device Batteries
vívofit jr. 2 - Replacing the Battery
vívofit 3 - Replacing the Battery
Garmin vívofit 4: 1+ year battery life, always-on color display, swim proof
Garmin introduces $80 Vivofit 4 with one-year battery life and color display | ZDNet
Garmin's Vivosmart 4 combines pulse-ox and a week of battery life for $129 | Ars Technica
Garmin Vivofit 4 has a year-long battery life, always-on colour
Vivofit 4
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