Citizen Eco-Drive WR100 mother of pearl face Watch

Citizen Women's Eco-Drive WR100 Watch with mother of pearl face The way a Citizen Eco-Drive works is that it runs off light as its power source, not a standard silver oxide battery. The technology inside a Citizen Eco-Drive can generate power from any light source whether it is natural or artificial and also from dim light sources. Lightly used needs a full days charge but does charge.