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Garmin launches Vivofit 4 activity tracker with a year of battery life - Liliputing
Garmin’s Vivofit line of wearable activity trackers offer all the basic features you’d expect from a bracelet that tracks your fitness stats, including step counting, sleep monitoring, and even water resistance. But while most fitness trackers have rechargeable batteries that you need to top off every 2-14 days, depending on the model (and usage), the …