HOW LONG WILL MY SMARTWATCH BATTERY LAST? Updated 15 June 2019 23:36 Follow Your battery will last up to 24 hours, depending on usage. Related articles HOW DO I CONSERVE BATTERY LIFE? I'VE PLACED THE SMARTWATCH ONTO THE CHARGER. WHY DO I NOT SEE THE CHARGING INDICATOR ON THE DISPLAY? HOW DO I CHARGE MY SMARTWATCH? AU Returns and Exchanges Fossil Watch Warranty Comments 0 comments Please sign in to leave a comment.