A battery is a device in which the energy of a chemical reaction is converted into electricity. Small, sealed button and six-volt batteries are used for consumer products. “Starting batteries” deliver a short burst of high power to start engines. “Deep cycle batteries” deliver a low, steady level of power for electrical accessories, such as trolling motors on boats. Large industrial batteries have thicker plates and can supply low, steady power for years. This profile is limited to lead-acid batteries used by motor vehicles.
A lead-acid battery consists of a polypropylene casing; lead terminals and positive and negative internal plates; lead oxide; and electrolyte, a dilute solution of sulfuric acid and water and plastic separators that are made of a porous synthetic material. More than 80 percent of the lead produced in America is used in lead-acid batteries.
Lead-acid batteries have the highest recycling rate of any product sold in the United States. This is because of the ease of returning a used battery when purchasing a new battery and the value of the lead and plastic components of the used battery.
Chaz Miller is state programs director for the National Solid Wastes Management Association, Washington. E-mail him at: [email protected].
Battery Council International, www.batterycouncil.org
“Measurement Standards and Reporting Guidelines,” National Recycling Coalition, www.nrc-recycle.org
“Municipal Solid Waste in the United States: 2007 Facts and Figures,” U.S. EPA, Office of Solid Waste, 2008, www.epa.gov/osw
Waste Age, “If They Ban It, Will It Go Away?”, Oct. 1993
Data is from 2007 EPA estimates, except where noted.
LEAD-ACID BATTERIES MSW
2.54 million tons, or 1.0% by weight.
16.84 pounds per person per year.
The average life of a car battery is four years.
The average life of a truck battery is three years.
A car battery contains 21.4 pounds of lead.
2.52 million tons, or a 99.2% recycling rate.
99% of battery lead is recycled, according to industry data.
Nine states have battery deposit laws.
Most states require retailers to collect old lead-acid batteries from customers who buy new batteries.
A typical battery contains 60 to 80 percent recycled lead and plastic.
Should never be placed in a composting pile.
Incinerated or Landfilled:
20,000 tons, or less than 0.1% of discarded MSW by weight.
Should not be incinerated.
41 states ban disposal in Subtitle D landfills.
Average car battery weighs 39 pounds.
Average truck battery weighs 53 pounds.
Average motorcycle battery weighs 9.5 pounds.
In 10 years, car battery cycles have increased from 2,500 to 6,000.
Industrial batteries can last 10 to 20 years.
Polypropylene casings processed back into new battery casings.
Lead is recycled into lead plates and other battery parts.
Battery acid is either neutralized, treated and discharged into sewers, or processed into sodium sulfate, a powder used in laundry detergent, glass and textile manufacturing.
A small amount is exported for recycling.