What is the battery life of ZeWatch4/4HR ? December 15, 2016 21:48 Updated The battery life of ZeWatch4/4HR is up to 5 days after a full charge. Battery life varies by use and settings. Related articles ZeWatch4/4HR is not charging, what can I do? Can I wear ZeWatch4/4HR while swimming or showering? How to view and reply SMS on my ZeWatch4/4HR? How to reset manually my ZeWatch4/4HR ? What options are available to view the time on my ZeWatch4/4HR ?