What is the battery life of ZeFit³ ? October 19, 2016 21:17 Updated The battery life of ZeFit³ is up to 5 days after a full charge. Battery life varies by use and settings. Related articles Can I wear ZeFit³ while swimming / showering ? What is the material used for manufacturing ZeFit³ strap ? How to charge my ZeFit³ ? Setting up your device with your mobile device How to sync my data on ZeFit³ App ?