Citizen has staked out a new position as the leader in ecologically friendly timekeeping with its Eco-Drives watches that are light powered. With models ranging from dress models to sports models to professional dive watches, Citizen Eco-Drive runs continuously in any kind of natural or artificial light for a lifetime of use. Fueled by light, it never needs a battery. Eco-Drive continuously recharges itself for a lifetime of use. Eco-Drive's revolutionary lithium-ion rechargeable battery stores enough energy to power the watch for an amazing six months, even in the dark. With its technological prowess, Citizen has managed to squeeze the amazing Eco-Drive into small and elegant women's eco-drive watches as well. Many of these watches feature crystal or diamonds or mother of pearl dials which just adds to their beauty and exclusivity.