HOW LONG WILL MY SMARTWATCH BATTERY LAST? Updated March 19, 2019 05:16 Follow Your battery will last up to 24 hours, depending on usage. Related articles HOW DO I CONSERVE BATTERY LIFE? HOW LONG DOES IT TAKE TO CHARGE MY SMARTWATCH’S BATTERY? How can I contact Fossil Customer Care by email? MY BATTERY WON’T CHARGE PAST A CERTAIN PERCENTAGE. HOW CAN I FIX THIS? HOW DO I SET UP “OK GOOGLE” VOICE ACTIVATION FOR GOOGLE ASSISTANT? Comments 0 comments Please sign in to leave a comment.