When battery terminals have been cleaned from heavy corrosion, sometimes this results in a grinding away of the post. When that occurs, the battery cable cannot be tightened enough to create a solid connection. This results in unreliable start-ups.
BG Battery Cable Savers correct this problem by filling in the extra space, allowing the cable to be tightened to complete a solid connection. A solid connection eliminates the starting problems that the faulty connection causes.