How long does the battery last after a full charge? October 21, 2015 20:16 Updated Between 3 to 5 days, depending on your daily usage. Related articles How long should I charge ZeFit2 Pulse for the first time ? How to charge my ZeWatch4/4HR? ZeFit2 is not charging, no battery indicator shows up? How do I charge my ZeFit2 Pulse for the first time? Can I wear ZeFit2 while swimming / showering?