Eco-Drive, first introduced by CITIZEN in 1976, is the technology at the heart of the Eco-Drive One. Light passing through the dial is converted into electricity by a solar cell. This electricity then charges the cell and is sent to the motor to move the hands. Eco-Drive can now charge in low light as well as sunlight, eliminating the need to replace batteries. Operating time has also been increased to more than six months on a single full charge. Eco-Drive continues to evolve, redefining the boundaries of what is possible.

