My battery was also severely corroded. I poured a baking soda and water mixture on it. I made the mixture thick and let it sit 5 min. before scrubbing with an old tooth brush. I then rinsed and it looks like new. I now also need to research a way to prevent it from happening again (I've read everything from hair spray to dielectric grease). I'm running an original 2008 battery. I have had no issues, but will probably upgrade soon.
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