HOW LONG WILL MY SMARTWATCH BATTERY LAST? Rachel Updated October 26, 2017 16:40 Follow Your battery will last up to 24 hours, depending on usage. Related articles HOW CAN I TELL WHEN MY SMARTWATCH IS CHARGING? HOW DO I CHARGE MY SMARTWATCH? I'VE PLACED THE SMARTWATCH ONTO THE CHARGER. WHY DO I NOT SEE THE CHARGING INDICATOR ON THE DISPLAY? WHY CAN'T I PAIR MY SMARTWATCH TO MY PHONE? Comments 0 comments Please sign in to leave a comment.