Disposable size 312 batteries are small, zinc-air cells that provide power to many hearing aids. This button-style battery type measures 7.9 millimeters in diameter and 3.6 millimeters in height. Used 312 batteries must not be placed into standard household trash or recycling bins because they contain materials that necessitate specialized handling. Proper disposal is a simple, required step in protecting the environment and ensuring safety for waste management personnel.
Why Hearing Aid Batteries Require Special Disposal
Hearing aid batteries are categorized as household hazardous waste in many regions due to their chemical composition. While modern batteries are typically mercury-free, the presence of zinc and other trace metals still presents an environmental risk if they end up in landfills.
When the outer casing of a discarded battery corrodes, these metals can leach out and contaminate soil and groundwater. This leaching process poses a threat to local ecosystems and public water supplies. Furthermore, residual energy left in a seemingly dead battery creates a physical hazard during collection and processing.
If a battery’s positive and negative terminals come into contact with other metallic waste, it can cause a short circuit. The resulting sparks or heat can easily ignite flammable materials commonly found in trash collection vehicles or recycling facilities, leading to fires. For these reasons, environmental laws often mandate or strongly advise against including button batteries with general waste.
Preparing Batteries for Safe Disposal
Before transporting used batteries to a recycling location, a simple preparation step must be performed to neutralize the fire hazard. This involves insulating the battery’s electrical terminals to prevent any accidental short-circuiting. The button cell design means the positive and negative sides are easily exposed, making this precaution particularly important for safety.
To prepare the battery, use a piece of clear, non-conductive tape, such as clear packing tape or electrical tape. Apply the tape directly over both the top and bottom flat surfaces of the button battery, completely covering the positive and negative terminals. Using clear tape is often preferred by recyclers because it allows them to visually identify the battery type and chemistry without peeling off the protective layer.
This small step prevents the flow of any remaining electrical charge if the battery rubs against metal objects or other batteries during storage and transit. Once taped, the batteries should be kept in a non-metal container, such as a sturdy plastic or glass jar, until they can be delivered to an authorized collection point.
Finding Approved Recycling and Drop-Off Locations
A primary resource for many users is their local hearing health professional or audiologist. Many hearing aid clinics and battery retailers offer convenient take-back programs, collecting used batteries from their customers.
Large retail stores and pharmacies that sell hearing aids often have dedicated collection boxes for used button batteries near their customer service desks or pharmacy counters. It is advisable to call ahead to confirm that the location accepts this specific type of battery for recycling. These programs ensure the batteries are aggregated and sent to specialized battery recycling facilities.
For users who prefer a municipal option, Household Hazardous Waste (HHW) collection events or permanent drop-off sites are a reliable solution. These programs are specifically designed to handle materials that cannot go into the standard waste stream, including button batteries. Information about these sites, including operating hours and accepted materials, can typically be found on your city or county waste management website.
Another option is a mail-in program, often available through battery manufacturers or third-party recycling companies. These services typically involve purchasing a specialized, pre-labeled kit or box designed for the safe storage and shipment of used batteries. While these programs may charge a fee, they provide a convenient way to recycle the batteries directly from home.