Works great for replacing worn out and corroded terminals The battery terminals are made of tinned copper with good electrical conductivity and corrosion resistance which can reduce voltage distortion and transmission loss. This product is made of high-quality materials to serve you for years to come. 1 0 4 8 Awg Gauge Ga Nickel Heavy Duty Battery Terminal Positive Jeep Accessories Car Audio Automotive Electrical The positive terminal usually has a red wire and the negative terminal has a black wire. . Enjoy Free Shipping Worldwide. Both can get corroded by improper use of the battery. Colour is how you can tell the difference between the positive and negative battery terminals in a car. Take caution at all times to never touch a metal object to both terminals of the battery at once. Free 2-Day Shipping wAmazon Prime. If there is positive battery terminal corrosion it is a sign that you are overcharging your battery. ...