The users can recognize the battery status by checking the battery icon which is displayed on the LCD part of the dial.
Moreover, by the secondary battery level indicator function, second hand of analog watch will tell the users when the battery level is extreme low.
Second hand goes by every 2-second when the battery level is low, in this case watch may stop soon such as within 2-days.
Second hand goes by every 4-second when the battery is almost empty. Immediate recharging is required. Watch may stop very soon.