This watch NEVER needs a battery, even when the earth stands still! The Citizen Calibre 4700 watch FB1090-57D features with two other lovely watches in promotional partnership with the forthcoming blockbuster movie,
"The Day The Earth Stood Still."

This is big marketing for citizens Eco-Drive watches, E-drive, these watches never need a battery.

What is an Eco Drive?

So what is Eco-Drive and how does it work, Eco-Drive watches absorb light, sunlight as well as artificial light to recharge the watch. This is done through the crystal and dial. When the watch is regularly exposed to light, it is continously recharging. No need to worry about those rainy days either! It has a 180 day power reserve. When the reserve depleats, it takes but four hours of ight exposure to be recharged.

Jewellers.net E-Drive Watch