multiple days of battery life, advanced training tools, and an abundance of holistic/workout tracking sensors. Based on my experience wearing the watch so far — and having reviewed the Polar V3 ...

Battery life isn’t too great either. Polar suggests that you’ll get up to five days in watch mode or up to 30 hours of continuous training using the GPS and heart rate monitoring features.

Polar has been quite busy over the past year or so releasing the Vantage V3 and Grit X2 Pro smartwatches, and it may have just saved its best watch for ... to seven days of battery life, it's ...