Use a wire brush to remove corrosion or gunk from the battery posts to ensure a strong electrical connection.

Take off all metal jewelry, as it can conduct electricity and cause a short.

Before connecting any equipment, ensure your work area is well-ventilated to disperse hydrogen gas that may be generated during charging.

Connect the red clip to the positive (+) terminal of the battery.

NAPA chargers range from manual models to "smart" microprocessor-controlled units. Napa Battery Charger and Noco Genius 10 - How They Work

Ensure the car's ignition and all accessories (lights, radio) are completely off. 2. Connecting the Charger