Excessive Battery Acid ruined me tonight.

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Tonight I found myself going to start my car, when, oh hey, it wouldn't start. I touched every light fixture to make sure I didn't leave something on and that definitely wasn't the case. I opened the hood to prepare my car for a jump when I came to find a shit-ton (yes, a shit ton) of battery acid built up on top of the positive terminal.

I recently had the oil changed about a month and a half ago, and besides them suggesting I get a new battery SOON, they didn't mention anything about the battery acid or potential corrosion. Jerks.

SO, my roommate came out to help me clean off the acid and hopefully jump-start my car. While cleaning, we noticed the terminals were incredibly loose, and not only that, completely destroyed.

Any advisement would be much appreciated, I have to a. call the place where I purchased the piece of crap duralast battery (autozone) in the morning regarding my 2 year warranty and b. figure out what the hell I need to do so I can get my car back up and running again.

This is normal right? Right as you hit the 5 year mark with your car all hell has to break loose on a night when everything is closed because of a holiday right?