In Lieu of a battery it is run by a small photo voltaic panel to the watch facial area (the 'Eco Push') and due to 'Atomic Timekeeping' it can assert to become the 'most exact watch on this planet'. If what is going on in Neuchâtel and Approach-les-Ouates is anything https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/