How To Remove Leaked Battery Acid. Spread the paste over the stained area and allow it to set for at least two hours. Cover the open end of the flashlight with plastic wrap or tin foil.

Mix vinegar and lemon juice and swab that onto the battery andor spill with a cotton swab which will neutralize the acid. After persuading it open with a pair of mol-grips I could see that one of the batteries had leaked and there was a big grey corroded-looking stain on the inside of the battery. All you need is about 10 minutes a q-tip.
This mixture neutralizes the acidic battery corrosion.
Cover the open end of the flashlight with plastic wrap or tin foil. Place a drop of vinegar or. Spread the paste over the stained area and allow it to set for at least two hours. If it is a small spill you can simply pour the baking soda over the acid and allow some time for it to neutralize the acidic liquid.
