Batteries contain various metals and chemical compounds that can contaminate groundwater if improperly disposed. The following types of batteries must be given to RMS for proper disposal at an EPA permitted disposal facility: lead-acid, mercury, lithium, nickel-cadmium, silver oxide and nickel metal hydride. Sealed lead acids batteries need to have the terminals covered with electrical or duct tape prior to pick-up.
The newer alkaline batteries, (e.g., flashlight batteries, clock batteries, etc.) do not contain leachable metals and can be disposed of as regular trash.