In 1976, we invented the world’ s first light-powered analog quartz watch that runs using only light as a power source.
Watches Powered by Light Eco-Drive is designed to convert both natural and artificial light into energy to power watches. Watches with Eco-Drive do not require any battery replacement, charging or winding to maintain constant operation.
Easy to charge even in Dim Light
Eco-Drive is designed so that any light source, no matter how dim, will generate the energy needed to power the watch. Light itself is the only energy source required to tell the time with an Eco-Drive watch.
Darkness Is not a Concern
One of the factors that distinguishes CITIZEN’ s Eco-Drive from other methods of keeping watches running at all times is its “power life.”Eco-Drive watches continue running for more than six months* on a full charge, even in total darkness. Thanks to our power saving function, CITIZEN makes it possible to develop watches that can operate for up to seven years without light.
*There areexceptions which run less than six moths without light.
|Never needs a battery||The ultimate convenience - no battery to replace ever!|
|Powere by any kind of light, so it can run and recharge continuously.||Under normal conditions in door and outdoor, there is ample exposure to light to keep the watch running - forever.|
|Power reserve can last from 6 months to 5 years (depends on model).||Keeps running reliably, even in the dark.|
|Low charge warning; quick start function (most models)||Instant feedback when charging is needed; just seconds to start up after exposure to light.|
CITIZEN has focused its development efforts on two different types of solar cells.
CITIZEN has dedicated itself to improving its technologies for energy saving watch movements. Our pursuit of innovation has allowed us to bring to the market many light-powered watches with advanced functions and designs. CITIZEN continues to work on the further enhancement of semiconductor chips, circuits and motors in its watches to even further reduce the power consumption of watch movements.
Insufficient Charge Warning
When an Eco-Drive watch with this feature has an insufficient charge, the second hand jumps in 2-second intervals. Once the battery is fully charged, the second hand returns to normal operation.
Power Saving Function
When an Eco-Drive watch with this feature is left in the dark, the hands stop in order to save energy. Once light hits the watch, the hands move quickly and automatically to catch up to display the current correct time.
CITIZEN invented the world’ s first* Light-Level Indicator for analog watches. It detects the intensity of light striking the dial and displays the electricity generation level at the moment, allowing wearers to easily gauge the charge level in any given situation.