George2615
Super Member
George, do you literally mean a voltmeter, or a multimeter set to read amps? I don't see how you'd read volts that way, since there's no electrical potential across the battery post to it's disconnected cable.
Yes, A volt meter. Try it sometime. Of course if you put the probes on the plus and minus terminals you'll read battery voltage. Then try one probe on the top of the battery. If the top of the battery is not clean and dry you will read voltage drain across the surface.