There may be little or no warning, however, if any of the following happens, your battery should be tested immediately:
· Motor has difficulty cranking over
· Headlights dim when the engine is idling, or
· Clock starts to loose time after the vehicle sits unused for several days
Note: To maximize the vehicle’s battery/charging system service life and performance, Interstate Battery’s technical group recommends a vehicle’s battery and charging system be tested at least semiannually or every time the oil is changed.