Why my mower’s working hour shortened after fully charged?

Usually, the battery ages after a long period of use, and the working hour gets shortened. You can contact your dealer and have the battery replaced to resume the previous working hour. Besides, the working hour of Navimow can get shortened when running on a lawn with complex conditions, such as long grass, complicated layout, etc. In this case, to reach the ideal working hour, you can mow the long grass with other mowing tools first and if possible, adjust the garden layout to a simpler one.