How do I know if my battery is fully charged? Customer Support Agent October 09, 2017 21:22 Please go to the device screen on your App and besides the device id# you will have the battery % level. Related articles How do I know if my unit is charging or charged? How do I charge the battery, power on or off? What is the average battery life? Is there a phone number to call? Comments 0 comments Please sign in to leave a comment.