This is also from the same site.....good info
" Recycling batteries
According to the EPA, each year over 2 billion used batteries are disposed into solid waste facilities in the United States. This constitutes 88% of the highly toxic mercury and 54% of the cadmium deposited into our landfills. They should be recycled; not discarded. NiMH (Nickel Metal Hydride) batteries are the most environmentally friendly batteries because they are made from non-toxic metals."
that's what kiils me when i see tapers using non rechargeable batteries and they're lying all over the section at the end of the show/fest. destined for the landfill