At any moment in time, one out of four car batteries needs replaced. The only way to know which one is to test every vehicle that comes in for service.

While the latest high-tech amenities are adding numerous safety, comfort and convenience benefits to a vehicle, they also are creating more battery-related issues for vehicle owners.

All but the youngest drivers remember when a slow cranking start or dim headlights signaled a dying battery. Those days are gone. Modern vehicles start instantly until — with no warning — they don’t. Many no-start problems occur when temperatures drop just a few degrees.