To get started replacing your old battery, make sure you also buy new cables, a wire brush, and terminal ends (optional).
Always remove the negative battery cable from the terminal post before the positive. Any sparks from or around the terminals could ignite battery gasses and cause personal injury.
In addition to having a clean battery and fresh new cables, you’ll experience more reliable starting power and performance of your 12V accessories. In this photo, we’re removing the negative cable from its grounding point on the engine block.