EZ on the Earth Battery Recycling Container Kit, 1 gallon battery recycling pail, pre-paid mail back recycle kit for lithium batteries and other dry cell batteries UN approved battery recycling pail, 1-gallon Battery recycling kit includes all shipping and packing materials needed Acceptable batteries for this kit: Alkaline, Nickel Cadmium (NiCad), Zinc-Carbon (Zn) (more below) Acceptable batteries (cont.): Rechargeable Lithium-ion (Li-Ion), Nickel-Metal Hydride (NiMH), Mercury, Silver-Oxide Properly recycling batteries keeps mercury and other hazardous substances out of the environment