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How to Clean Battery Corrosion

Lowe's Editorial Team

By Lowe's Editorial Team
Published November 29, 2024

Corrosion often develops in batteries due to moisture buildup. Knowing how to clean battery corrosion can extend the life of your batteries. Here is a simple procedure to help you clean battery corrosion.

Tools and Materials

Materials

  • Baking soda

  • Water

  • Dielectric Grease

What is Battery Corrosion

Battery corrosion results from a chemical change, whereby battery acid drips and comes into contact with water, dust, or any metal. Corrosion hinders the correct connection of the circuit and might even pull or harm the battery. 

Caution

Battery corrosion may be a sign of a defective battery. Get the corroded battery inspected by a professional before using it.

What Are the Signs of Battery Corrosion

The primary visible indication of battery corrosion is a white, blue, green or red crust-like substance near the positive and negative battery terminals. You may also observe the presence of pits and corrosion at the region where the metal battery terminal is connected. Battery corrosion can cause a host of problems like:

  • Problems starting the engine
  • Dim headlights 
  • Battery drain 
  • Electrical shorts 

If you find any of these battery or electrical issues, check for corrosion buildup on the battery posts and cables.

9 Easy Steps on How to Clean Battery Corrosion

Here are the step-by-step instructions to clean battery corrosion: 

Preventing Future Battery Corrosion

Even though cleaning battery corrosion is a swift process, it is always advisable to prevent corrosion build-up in the first place. Here are some tips to avoid corrosion:

  • Ensure that terminals are clean and coated with dielectric grease. This prevents corrosive build-up 
  • It is very important that all the cables are secured tightly. Any loose cables can cause short circuits. 
  • It is also important to clean up any leaked battery acid. These acids are highly corrosive. 
  • Batteries should always be kept in a cool, dry place away from direct sunlight. Exposing them to heat can shorten their life. 
  • Consider lithium batteries if they are to be stored in a humid environment.

Detecting and resolving battery corrosion can improve its performance and increase the battery’s life. The above steps can clean battery posts using a simple baking soda solution. Regular battery care also has a positive impact on minimizing further corrosion issues. 

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