How Long Will My Smartwatch Battery Last? April 18, 2019 03:07 Updated Your battery will last up to 24 hours, depending on usage. Related articles How Long Does It Take To Charge My Battery? How Do I Charge My Smartwatch? What are Smart Battery Modes? How Do I Power On My Smartwatch? Why did my watch stop working and only show the time? Comments 0 comments Article is closed for comments.