Citizen's Eco-Drive watch never needs a battery

While we doubt that used watch batteries are the most heinous cause of environmental degradation, there is some appeal to Citizen's Eco-Drive solar-powered watches: you never have to worry about replacing a battery again. Of course, if you're trapped in a dimly lit cubicle all day, and still want a zero-pollution watch, you may want to consider a kinetic model instead — though the Eco-Drive does have a power-saving mode that shuts down certain functions (like the second hand) when it's in the dark, and it can also reset itself automatically once you venture out into daylight again.