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Clean nickel cadmium, alkaline, lead-acid, and lithium-ion acid leaks
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Battery acid spills can seem scary, but with the right tools, you can get it cleaned up in no time. It’s important to wear gloves, safety goggles, and a face mask and identify the type of battery before cleaning up battery acid. Double-bag the battery and dispose of it at the appropriate recycling center, then follow these instructions to clean up the acid from lithium-ion, lead-acid, nickel cadmium, and alkaline batteries.

Cleaning up Lead-Acid or NiCd Battery Acid

Sprinkle the area liberally with baking soda until it stops fizzing. For larger spills, absorb any leftover material with clay or kitty litter, shovel it up, and double-bag it. For small spills, use a couple of paper towels to absorb the baking soda mixture and place them in a double bag.

1

Protect your hands and face.

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  1. Battery leaks can contain caustic chemicals that irritate the skin, lungs, and eyes. Automotive repair specialist Duston Maynes recommends wearing safety goggles, a face mask, and rubber, nitrile, or latex gloves before you handle the battery or the leaked material. Open all the windows and doors and use a fan to ensure the area is ventilated.[1]
    • If you get battery acid on your skin or in your eyes, rinse the area in lukewarm, gently flowing water for at least 30 minutes. Under running water, remove all contaminated clothing and accessories.[2]
    • Acid leaks, typically from a car battery, are much more dangerous than alkaline battery leaks.
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2

Determine the battery type.

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  1. Most batteries for cars and other motor vehicles are lead-acid batteries.[3] Smaller batteries that slot into electric devices are more varied, so examine the label to find the type. The most common types for small batteries are alkaline, lithium, and nickel-cadmium (NiCd).[4]
    • Size and shape alone are not reliable identification methods.
    • If the only label is the voltage display (V), you can make an educated guess:[5]
      • Nickel cadmium (NiCd): 1.20V or 1.25V.
      • Alkaline batteries: 1.50V.
      • Lead-acid batteries: 2 to 2.10V.
      • Lithium-ion batteries: 3.60V to 3.70V or higher.
3

Remove and dispose of the battery.

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  1. Double-bag small batteries separately in small plastic bags. Put car batteries and other large batteries inside two trash bags, ideally made from 6mm+ (0.2 in) thick polyethylene. Tie or seal the bag closed immediately.[6] In some places, you can dispose of alkaline batteries in the trash, but most other batteries are required to be recycled by law.[7]
    • Visit earth911's online tool to find a nearby hardware store or other location that will recycle your type of battery.[8]
    • Lithium-ion batteries can explode or catch fire, so they cannot be placed in household garbage or recycling bins.[9]
    • Some battery manufacturers may offer you a free or reduced-price replacement battery in exchange.
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4

Wipe up lithium spills with water.

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  1. For lithium-ion batteries, like cell phone batteries or "button" batteries, place the bag in a non-metal, leak-proof container.[10] Any electric device exposed to the leak is no longer safe to use. Throw the device away, and clean up spills with water and a soft cloth.
    • If you have access to a lithium spill kit, neutralize the material with the absorbent material and neutralizing agent, put the absorbent into a sealable bag, and clean the area with water.[11]
    • Alternatively, clean the area with an ammonia-based cleaner.[12]
5

Neutralize lead-acid or nickel-cadmium spills with baking soda.

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  1. These types of batteries leak a strong acid, which can eat through clothing, carpet, or even metal. Cover the area liberally with baking soda. The acid is neutralized when the baking soda stops fizzing. Absorb the leftover material with clay or kitty litter and shovel it all into a doubled trash bag.[13]
    • If the battery is broken or damaged, sprinkle a liberal amount of baking soda inside the double bag containing it.
    • If there’s acid on surfaces around the battery, you may need to use a wire brush to scrub it off. Use an absorbent microfiber cloth to dry the area once the corrosion is gone.
    • Make sure you have gloves and a face mask on before tackling one of these spills.
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6

Clean up alkaline spills with mild household acid.

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  1. For alkaline batteries, dip a cotton swab in vinegar or lemon juice and apply a few drops to the affected area.[14] Use a cotton swab dipped in 90 to 99% isopropyl alcohol to remove residue. Wipe the area with a microfiber cloth, then let the device dry for several hours.[15]
    • Although the potassium hydroxide that leaks from alkaline batteries is often called “battery acid,” it’s actually a base on the pH scale, meaning it’s best neutralized with an acid.[16]
    • Use a toothbrush or toothpick to scrape off lingering corrosion in the battery compartment and contacts. For heavy corrosion, use fine sandpaper, an emery board, or a small screwdriver to gently scrape off the residue.[17]

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Community Q&A

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  • Question
    Is rubbing alcohol okay for alkaline battery spills? A tech friend once advised this.
    Community Answer
    Community Answer
    It's better to use vinegar or lemon juice; you want a mild acid to neutralize the alkaline substance.
  • Question
    I have an old battery box from an electric forklift that is very corroded from the old batteries. Can I clean this and use in an a pot for a flower garden or vegetables?
    Community Answer
    Community Answer
    Is not a good idea, because the box can still contain some pollutant leaked by the battery. Any kind of vegetables you put in can absorb those pollutants.
  • Question
    How do I clean acid battery from a golf cart?
    Community Answer
    Community Answer
    You can either get some battery acid cleaner at an auto parts store or mix some baking soda and water to use to clean the acid. Wash away the residue with water.
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Tips

  • To prevent battery acid leaks in the future, make sure the batteries are properly installed, avoid mixing old and new batteries in the same device, and remove them if the device hasn’t been used for a long time.[18]
  • Make sure to store batteries in a cool, dry location out of direct sunlight and use a rubber band to bundle multiple batteries so their terminals don’t touch.
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Warnings

  • Large spills involving several liters (or gallons) of liquid or more should be handled by the fire department. Call an emergency number like 911 and keep everyone away from the area.
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About This Article

Duston Maynes
Co-authored by:
Automotive Repair Specialist
This article was co-authored by Duston Maynes and by wikiHow staff writer, Cheyenne Main. Duston Maynes is an Automotive Repair Specialist at RepairSmith. Duston specializes in leading a team that handles a variety of automotive repairs including replacing spark plugs, front and rear brake pads, fuel pumps, car batteries, alternators, timing belts, and starter motors. Duston holds an Associate’s degree in Automotive/Diesel Technology from The Universal Technical Institute of Arizona and is a Certified Diagnostic Technician and Automobile Mechanics Technician through BMW STEP. RepairSmith received The 2020 Big Innovation Award by Business Intelligence Group and The Startup of the Year by the American Business Awards. RepairSmith was also included in Built in LA’s 50 Startups to Watch and The Business Intelligence Group’s 52 Names Leading the Way in Customer Service. RepairSmith offers in-home services to provide car owners convenient and complete auto repair everywhere. This article has been viewed 720,403 times.
2 votes - 100%
Co-authors: 32
Updated: June 12, 2024
Views: 720,403
Article SummaryX

To clean up battery acid spills, first put on a pair of rubber gloves as well as a safety mask or goggles. Place the battery in 2 plastic bags, seal the bags tightly, and inspect the battery label to see what type it is. For an alkaline battery, clean up the spill using a mild acid like vinegar or lemon juice. If the batter is a lithium battery, wipe up the spill with a paper towel soaked in water. Be sure to dispose of the batteries as soon as the spill is cleaned. For tips on cleaning up other battery acid spills, such as lead or nickel-cadmium, scroll down!

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    Katherine Owens

    May 31, 2017

    "I had a battery leak in a lamp. I was always told to use baking soda, so I looked it up just in case. It was a good..." more
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