You suppose the batteries are almost dead because your flashlight keeps becoming dimmer and dimmer. These are "D" cells that have a 1.5 volt output. You remove the batteries and use a voltmeter to check them. The meter indicates that the batteries have a potential of almost 1.5 volts. Are the batteries dead, or is there another issue? Talk about how to test a flashlight to determine if it has any internal issues and how to identify if the batteries are dead. Is it a choice between two options? Explain.