How long should I charge ZeWatch3 for the first time? August 19, 2015 16:03 Updated We recommend charging it during 1:30 to 2 hours. Related articles What does ZeSplash2 track? ZeWatch3 battery indicator disappears after a few seconds. Does it mean that it is not charging? Can I charge my ZeWatch3 with a wall plug (110V - 240V) ? How to charge ZeWatch3 ? After I remove ZeWatch3 from its charger, the screen remains black .