Slower than normal cranking may be a sign that your battery is holding less than its optimal electric charge. Oxidation of the battery terminals and build-up of exterior dirt and corrosion accelerate the loss of current through the case of the battery thus prematurely discharging it.
Over time corrosion accumulates on the battery posts and terminals to the degree that this build-up begins to drain power from the battery. That’s one of the reasons battery failure is the #1 culprit for calls made requesting roadside assistance.
A battery cleaner and leak detector is applied after a thorough cleaning and inspection. Anti-corrosion BG Battery Terminal Protectors are installed and the battery posts, terminals and case are sealed.