Connect the to a heavy metal part of the engine block or frame (if the battery is in the car) or the Negative terminal (if the battery is out of the car). 4. Plug In and Select Rate

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Ensure the charger's voltage selector matches your battery. Most modern cars use . Using the wrong setting can damage the battery or the charger. 3. Connect the Clamps Connect the Red (+) clamp to the Positive battery terminal.