Re: battery cut off switch

Posted by Fred Puhn On 2010/9/7 9:37:18

Just a comment based on experience. With all those extra connections the starter motor will run on reduced voltage, depending on the material conductivity, size, and surface condition of each contact. If the extra voltage drop caused by the added connections and extra parts gets too high you will experience slow cranking and difficult starting. The battery has a fixed voltage and any resistance in the cables and connections reduces it from there.

When I want to disconnect the battery for safety while working on the car I just unbolt the ground clamp from the battery post.