How to Remove Battery Corrosion

by ContributorUpdated September 28, 2017

Leaky batteries leave behind alkaline battery acid build up. This build up can be in the form of white chalky material or liquid. This residue is very harmful to your skin and eyes, so take extreme caution to protect yourself when removing battery corrosion.

Use extreme care when cleaning battery corrosion. Put on old clothing, rubber gloves and eye protection prior to the cleaning process.

Remove batteries from the electronic device that needs cleaning, or remove all battery grounding connections. For example, if cleaning a car battery, remove the negative terminal first, and then the positive terminal.

Scrub away corrosion from the connectors and posts with a dry, stiff brush.

Mix equal parts of baking soda and water and apply the mixture to the corroded portion of the battery posts, taking care to avoid getting the solution inside the electronic device or the car battery. Wait for the baking soda solution to dissolve the corrosion.

Take a clean cloth dipped in water and rub it over the areas that were treated with the diluted baking soda. Repeat this several times, washing the towel clean in between, in order to clean the base material from your electronic device or car battery.

Reinsert or reconnect your battery once air-dried.


Properly dispose of any batteries that appear to be leaking per the environmental requirements of your city/county. Never clean any device or battery while still connected to some form of power source. Use extreme caution when cleaning battery corrosion; battery acid will eat away at your skin. Always wash your hands thoroughly after cleaning battery corrosion to ensure that you do not have battery acid on them.

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