How long should I charge ZeFit2 Pulse for the first time ? October 21, 2015 20:11 We recommend charging it during 1:30 to 2 hours. Related articles How long does the battery last after a full charge? What are the patterns of Caller ID? My ZeFit2 Pulse is already connected to another account, what should I do ? ZeFit2 is not charging, no battery indicator shows up? Can I charge my ZeFit2 with a wall plug ?