The Hidden Environmental Cost of Throwing Batteries in the Trash

It’s easy to toss a dead battery in the trash without thinking twice. But “dead” doesn’t always mean harmless as, depending on its chemistry, a battery may still hold enough energy to start a fire or contain materials that should be kept out of the environment. Getting them to the right collection site helps protect people and the environment and gives useful materials another life. 

The Trouble Can Start Before the Landfill 

Trash is compacted, dropped, and crushed as it moves through collection trucks and waste facilities. That rough handling can damage a lithium-ion battery, causing it to short circuit and ignite. A battery fire can put workers and nearby communities at risk and create air pollution.  

Lithium-ion batteries and devices containing them should never go in household trash or curbside recycling bins; they need a separate collection route. Doing so helps keep fires out of trucks and sorting facilities while giving recyclers a chance to recover valuable materials. 

Don’t Forget the Battery Inside the Device 

Batteries can cause problems even when they’re tucked inside a device. Wireless headphones, toys, power tools, and other electronics may contain lithium-ion batteries that can be damaged if the whole thing gets tossed in the trash. If you can’t safely remove the battery, take the device to an electronics recycler or a collection program that accepts it. Be sure to check what they take before you head over. 

What About Soil and Water? 

The contents of a battery depend on its type. A lead-acid car battery, for example, contains lead and an acidic electrolyte. If the battery breaks and its contents are handled improperly, they can pollute soil and water. Improper disposal of lead-acid batteries has caused this kind of contamination in the past. 

That doesn’t mean every battery thrown away will leak into groundwater, as modern landfills have safeguards. Still, mixed household trash isn’t the best place for something that may need special handling. Separate collection lets batteries be sorted by type and managed properly. 

Recycling Turns Waste into a Resource 

Making batteries takes energy and raw materials. Specialized recyclers can recover metals and other useful components from used batteries so they can go back into production. Recycling doesn’t undo the impact of making a battery, but it can help conserve resources and reduce the need for newly mined materials. 

Getting a battery to the right place matters; a recycling symbol doesn’t mean you should put a battery in your curbside bin. Household recycling facilities that sort paper, cans, and bottles are generally not equipped to handle loose lithium-ion batteries safely. Check for a battery take-back program at a participating retailer, an electronics recycler, or a local household hazardous waste site instead. 

How to Handle Used Batteries at Home 

First, figure out what kind of battery you have. Rechargeable batteries, single-use lithium batteries, button cells, and lead-acid batteries should go to a collection program that accepts them. 

For lithium batteries, cover exposed terminals with nonconductive tape or keep each battery in a separate bag to reduce the chance of a short circuit. Follow the collection site’s instructions before dropping them off, as if a battery is swollen, leaking, or damaged, contact the manufacturer or your local waste authority for handling guidance. 

Common alkaline batteries are a bit different. The U.S. Environmental Protection Agency says they can safely go in household trash in most communities, though it recommends recycling them when possible. Rules and collection options vary by location, so a quick check with your local waste authority is worthwhile. 

You don’t need elaborate battery storage solutions to make this a habit. Set aside a spot for used batteries away from kids, pets, heat, and loose metal objects, then drop them off regularly. 

Protecting the Environment for the Future 

A battery may be done powering your device, but its materials can still be useful. Taking a moment to sort and dispose of it properly can help prevent fires, reduce the risk of pollution, and keep valuable materials in use. Check your local collection options and give each battery the right way out of your home. 

AUTHOR BIO: Sander Jacobs is the co-founder and CCO of Renewance, Inc., which provides comprehensive lifecycle management service solutions for industrial batteries, placing it at the forefront of the transition to a sustainable, decarbonized economy. Sander has a profound passion for enabling the safe and sustainable utilization of batteries. His drive supports the societal transition to e-mobility and renewable power generation. Sander excels in providing strategic solutions to clients, ensuring they receive optimal benefits from the products and services offered. His career spans several outstanding companies, including Renewance, VMI Group, Wabtec Corporation, General Electric Company, DSM, and Momentive Performance Materials, transcending diverse industries, products, and services.