Copper cable lugs are often treated with electro-tinning to significantly boost their performance and longevity in electrical systems. This electro-tinning process involves applying a thin layer of tin to the surface of the copper lug through electrolysis. Here’s why this is such a great idea: - Corrosion Resistance: The main reason for electro-tinning copper cable lugs is to ... https://www.pioneerpowers.com/copper-cable-lugs.php