How To Clean Battery Acid From Flashlight

What To Do If Your Flashlight Batteries Are Acidic?

Your long-running flashlight is not working properly or its efficiency decreasing gradually. Even after replacing the new battery, the service is not giving as before. This is only because of leakage of battery acid, and for this, your flashlight battery terminals are corroded.

The most asked question is, how to remove battery acid from flashlight. Cleaning battery acid from flashlight is a very simple task; you don’t need to be an expert. Only by knowing these things you can fix your flashlight any time.

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How To Clean Flashlight Battery Acid: Quick Solutions

Clean Flashlight Battery Acid

As we move through the steps, we need to keep;

  • Protecting Gloves
  • Toothbrush or long brush for MagLite
  • White Vinegar
  • Baking Soda
  • Water, and
  • Cotton Towel

Battery acid may irritate your skin. To avoid this, I suggest you cover your hand with a gloves.

Steps 1: Remove the Batteries

removed way of flashlight battery

Remove the batteries from your flashlight and dissembling the device, now you can see the acid germs.

Steps 2: White Vinegar

rubbing white vinegar with a toothbrush

On this steps you need to clean the inner light, Soak the toothbrush in a container with a little vinegar. With this wet brush keep rubbing the acid-affected area of the light. After doing this a few times, dry the flashlight with a cotton towel. Done, now check it.

Steps 3: Baking Soda and Water

way of using baking soda

In this part you soak the toothbrush in water, take some baking soda (Baking soda neutralized battery acid) on the wet toothbrush, and rubbed the acid affected terminals with lite-medium force. Just do it a few times. After all this clean the flashlight with a cotton towel. Hope your device is ready.

Steps 4: Lemon or Coke

Pour some lemon juice or coke on your brush and rub again on the corroded terminal, after rubbing well dry-up the terminal. Lemon juice will protect your device from rusting up.

Moreover, Battery acid is a highly corrosive liquid. This is because it contains sulfuric and nitric acid. Battery acid has a very low pH level which can cause your device not functioning.

As a result, it is important that the battery acid should be removed from your loving flashlight.

Some Tips For Avoiding The Leakage of Battery Acid

  • Don’t overcharge it 
  • Always store in right place (below 15C or above 38C )
  • Clean your flashlight regularly   
  • Avoiding to mixed old and new battery 
  • Using anti-corrosive gel (are protect your flashlight terminal from corrosion)


If the light does not functioning after the above steps, you can consult with a mechanic before taking a new one. But so far my knowledge goes it will work.

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