Eco-Drive
Eco-Drive is Citizen's light-powered quartz technology. A cell behind the dial converts any light into energy, so the watch never needs a battery change and, fully charged, keeps running for months in the dark.
Eco-Drive marries the precision of quartz with the convenience of light: a cell behind the dial turns sunlight or room light into energy, so the habit of swapping batteries disappears altogether.
How light becomes power
Citizen made the world's first light-powered analogue watch in 1976; the modern Eco-Drive, with its cell hidden behind the dial, has carried that idea forward since 1995. The light cell behind the dial gathers both daylight and indoor lighting and stores it in a rechargeable cell. At heart it is a light-fed quartz watch, drawing its energy from the light that falls on it rather than from a disposable source.
What it gives you in practice
- Built to last for years: the rechargeable cell is built to last for many years and is not a routine service item
- No battery changes: with no battery to replace, that service item simply disappears
- Months of reserve: fully charged, it carries on running for months in a dark drawer
- Nothing to throw away: there is no spent battery to dispose of
It is a sensible choice for anyone who wants a wear-it-and-forget-it watch with no maintenance. You can explore the whole movement family in the Movement category, and read up on storied Japanese houses such as Citizen in our Best Japanese Watches guide.
Related terms
Frequently asked questions
Does an Eco-Drive watch ever need a battery
No, there is no battery to replace. Eco-Drive stores energy in a light cell behind the dial, and that rechargeable cell is built to last for many years, so the usual battery change never arises.
How long does an Eco-Drive run in the dark
Fully charged, an Eco-Drive carries on running for months in a dark drawer. It would have to sit without any light for that long to stop, and in everyday use the dial draws in room light continuously.
What is the difference between Eco-Drive and a regular quartz watch
Both use the same accurate quartz movement; the difference is the energy source. A regular quartz watch depends on a battery you replace, whereas Eco-Drive draws its power from the light that falls on it, so there is no battery change and no spent cell to dispose of.