Eco-Drive

Citizen Promaster Eco-Drive AP0440-14F Diver's 200 m manufactured in 2000. The 7878 caliber Eco-Drive movement used in this watch can run for up to 180 days on its secondary power cell. Four solar cell segments are just visible under the dial.
Citizen Attesa Eco-Drive ATV53-3023 analog-digital chronograph with 4 area Radio Controlled reception (North America, Europe, China, Japan). Manufactured in 2010.
Citizen Eco-Drive METAL AW1365-19P featuring a light-absorbing "solar ring" instead of solar cell panels, allowing opaque metal dials to be used.[1]
Example of the invisible solar cells thanks to VITRO technology, using the CB0021-06E radio-controlled watch model (from 2011 to 2018).

Eco-Drive is a model range of watches manufactured and marketed worldwide by Citizen Watch Co., Ltd., powered primarily by light. As of 2007, the company estimated the drive system had eliminated the disposal of ten million batteries in North America.[2]

Citizen introduced the Eco-Drive line to Asia, Latin America, and Europe in 1995 and to the United States in April, 1996.[3]

The Eco-Drive concept introduced several technical refinements over previous solar powered watches, including light-capturing cells that could be made virtually invisible behind the dial instead of highly conspicuous, enhancing the appearance of the watch.

  1. ^ "Eco-Drive METAL Watches". Citizen Watches Australia. Archived from the original on 18 July 2014. Retrieved 12 February 2015.
  2. ^ "Celebrating 30 Years Of Environmentally-Conscious Watch Making -". CSRwire.com, Mar 06, 2007.
  3. ^ "Citizen Holdings Co., Ltd". Answers.com. March 2011. Retrieved 2012-04-22.