What kind of batteries do you have that do not contain toxic chemicals or heavy metals? Just because some people (countries?) let you put them in the trash does

What kind of batteries do you have that do not contain toxic chemicals or heavy metals? Just because some people (countries?) let you put them in the trash doesn't mean they should go in the trash. http://en.m.wikipedia.org/wiki/Battery_recycling http://en.m.wikipedia.org/wiki/Battery_recycling