According to the state Department of Environmental Services, some batteries are hazardous waste because of their toxic contents and reactive properties.
Alkaline batteries sold after 1996 have no mercury and may be thrown away. These can be identified by the green stripe, a green tree, an “Hg free” label or an expiration date later than 1998. Older batteries should be taken to a collection location or recycling facility.
Zinc carbon and zinc chloride batteries are non-hazardous and can be thrown out.
Lithium batteries are hazardous waste and should be brought to a collection center.
Button cell batteries may contain mercury or other hazardous substances. They should be brought to a collection or recycling center.
Rechargeable batteries are more expensive but save money in the long run because they can be recharged many times. They’re the best choice for devices that get regular use, says DES. The most common types are:
• Nickel cadmium. It’s the most common type of rechargeable battery and can replace about 150 alkaline batteries.
• Sealed lead-acids are less expensive but much heavier than other types of rechargeable batteries.
• Nickel metal hydride batteries are used in computers, cell phones and camcorders. They have a low drain and a high-energy capacity.
• Lithium ion batteries are very expensive but extremely light and high in energy density. They’re used in some cell phones and notebook computers.
Recycling batteries: The Rechargeable Battery Recycling Corporation’s website will help you find a list of retailers in your area that accept portable rechargeable batteries and old cell phones for recycling, free of charge.
For more information, visit www.rbrc.org. For more information on regulations, battery disposal options and recycling facilities and collection centers, call the New Hampshire Hazardous Waste Assistance Hotline at 271-2942 or DES at 271-3503.