Natural and artificial lights are absorbed through the dial. A special solar cell converts the light into energy. Enough energy is stored to power the timepiece, even in the dark, from 135 days to 7 years depending on the model.
All of the CITIZEN-Eco-Drive watches purchsed from Award Leather are with 6 months or more power reserve (in total complete dark environment). Each of them comes with CITIZEN'S FIVE YEARS manufacturer warranty. Included in the first year of this Warranty is a one year International Guarantee.