How to Remove a Corroded Battery – Safety and Solution

Corrosion is the enemy of batteries. When you're trying to remove a corroded battery, it's important to keep it from spreading. One way to do this is by using a barrier like petroleum jelly around the area you need to work on. This will help protect the surrounding areas and keep them clean while you bring out the tools and get started.

Corrosion can form on the terminals of a lithium-ion battery and prevent a connection from being made to power it. The corrosion is typically caused by moisture, which can get inside the battery's casing through scratches or cracks.

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When corrosion has formed, you'll typically notice:

The device will not turn on, no matter how many times you press the power button

If the device is powered off, and you hold down the power button for more than 10 seconds, it will vibrate and indicate that the battery is dead

You'll notice a discoloration around the edges of the battery terminals and on the remaining piece of plastic holding them in place

Remove the corroded battery as soon as possible. If left long enough, it could cause permanent damage to your phone. Here's how to remove acorroded battery:

Step 1: Use something like an old toothbrush or nail file to help loosen the corrosion from around the edges of the terminals. You want to be careful not to spread any corrosion further into the battery housing; use a cloth or paper towel held in your hand for this part.

Step 2: Use an old toothbrush or other small brush to help remove as much corrosion as possible from both terminal ends. If you have a millimeter, you can check for current once you've cleaned away as much of the debris from around each post as possible.

Step 3: Once you feel confident that there won't be any additional exposure of metal parts, go ahead and remove whatever is left on there with some sandpaper or emery cloth—then wipe away all traces with a clean, dry cloth.

Step 4: Now that we've got it all cleaned off, let's see if it will function. When you're sure all corrosion has been removed from the battery contacts on both sides of the device, reconnect it and put your device back together. Plug it in and turn it on—battery corrosion can cause a failure to power on, so if that happens, check for any remaining corrosion using your millimeter before proceeding further with troubleshooting.

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How to Clean Car Battery Corrosion? 

If your car battery has been sitting around for a while, you may find that it's covered in a white crust of corrosion. This is actually a chemical reaction between the lead plates inside the battery and the electrolyte solution that's used to give power to the car when it's running. If you want your battery to be good working order, this corrosion needs to be removed. 

If your car battery casing is tarnished to the point where you can't read the writing on it, you probably have a corrosion problem. As with many things, prevention is the best cure. If you notice white or yellowish-brown buildup on your battery, start treating it immediately by following these steps:

Step 1: Remove any loose rust with a wire brush. This will help keep you from pushing the corrosion further into crevices that are harder to reach.

Step 2: Mix baking soda and water into a thick paste. Use this paste to scrub the corrosion off of the metal parts of your battery.

Step 3: Scrub the remaining paste off of your battery with a damp rag and then wash away any residue with clean water.

Step 4: Rub petroleum jelly on the terminals to prevent future corrosion from ruining your cables. You should also take this opportunity to wipe away any rust or debris from inside the battery's casing if you can still see it.

How to Dispose of Corroded Batteries? 

Corroded batteries are a reality of the modern age, and they can be pretty dangerous. If one gets into contact with a device, it could cause damage to that device and possibly even start a fire or explosion. Batteries can corrode due to exposure to moisture or condensation, a chemical reaction with other materials in the battery's vicinity, or even if they're left on a shelf for too long without use. 

There are two main ways to dispose of corroded batteries: recycling and landfilling.

"Lead-acid batteries have been classified as hazardous waste because of their environmentally damaging components," says Dr. Bruce Fowler from the EPA's Hazardous Waste Management Division. "They should never be placed in household trash due to safety concerns for sanitation workers and because the trash may end up in a landfill that is not equipped to handle them."

The best way to dispose of corroded lead-acid batteries is through recycling programs available in many municipalities across the country. Check with your local government or an independent battery recycling service for information on how to recycle corroded lead-acid batteries safely. If you can't find a recycling program near you, contact your local government's solid waste department to see if they will accept your old batteries at the landfill and check with your state environmental agency about regulations that apply to this type of product disposal.

Is Battery Corrosion Dangerous?

The first thing to know is that the corrosion will not hurt you. It's not a chemical reaction that can be passed on to anything else, nor will it start a fire or emit poisonous fumes. The only danger is that the corrosion might get hot enough to ignite flammable materials nearby, such as wooden furniture, bedding, or even flammable clothing if it gets hot enough.

This means you should never store batteries inside anything that could burn, and that you should always avoid dropping batteries or devices with batteries in them on hard surfaces near anything flammable. The best place to store them (and any device with a battery in it) is in a metal box or container, such as a food storage bin. That way the heat generated by the corrosion will be contained and won't do damage to your home.

If you choose to dispose of batteries, make sure they're wrapped so they don't short out on each other and spark any fires while they're in your trashcan or garbage truck. Dispose of them at a hazardous waste center if possible, because they contain toxic materials like lead, mercury, nickel chloride, cadmium chloride and zinc oxide, all of which are harmful to the environment when thrown away without special precautions.