Abstract: Exemplary methodologies and apparatuses for testing and calibrating small-signal battery testers are provided. An exemplary apparatus includes one or more capacitors electrically coupled to one or more conductive elements, and a power supply. The one or more conductive elements include one or more connection points for connecting the small-signal battery tester. The one or more connection points are arranged to arrange the selection of one or more impedance, conductance, resistance or admittance values that can be used to test or calibrate or test a small-signal battery tester.

Abstract: A timing light for measuring timing of spark ignition has separate displays of engine RPM and timing advance. Another aspect of the invention provides a flashlight function which triggers the flash tube of the timing light to produce a constant bright light source for locating timing marks within an engine compartment. The flashlight function can be incorporated into a dual display digital timing light, or other timing light designs. A dedicated control on the timing light functions to place the flash tube in a continuous flashlight mode.

Abstract: A timing light for measuring timing of spark ignition has separate displays of engine RPM and timing advance. Another aspect of the invention provides a flashlight function which triggers the flash tube of the timing light to produce a constant bright light source for locating timing marks within an engine compartment. The flashlight function can be incorporated into a dual display digital timing light, or other timing light designs. A dedicated control on the timing light functions to place the flash tube in a continuous flashlight mode.