If you plan to take your dead car battery to O'Reilly Auto Parts, you'll need to first remove the battery safely. First, make sure you're wearing gloves in case there's a leak. Loosening the terminal's nut could take a wrench — and there are a few other tools you'll possibly need, like gloves, safety glasses, and cleaning supplies. Before heading to the store, you'll need to store it in a safe manner. This will make sure the grease and other contaminants on the battery won't stain your car.