How To Remove Battery Corrosion From Contacts. A brass or steel brush is the most common method of scrubbing off oxidation although for sensitive contacts nylon is also used. Brush the loose particles away.

Take care to work in a protected area such as over a sink garbage can or over some old newspaper. Dip your cotton swab into the vinegar and lightly scrape against the corrosion build up inside the battery compartment. I bought this Lego Mindstorms RCX brick on eBay for cheap because it said it didnt work.
Dip your cotton swab into the vinegar and lightly scrape against the corrosion build up inside the battery compartment.
I was able to soak the spring battery contact in distilled white vinegar for 10 minutes followed by a hearty scrubbing with an old toothbrush. How to protect a battery terminal after removing corrosionHelpful. With this method take care to avoid damaging contacts and other components. Step 1 - Pre-Clean The Battery Compartment.

