No need to get your nose close. Use a voltmeter or multimeter (your new best friends). Then check the battery voltage—around 12.6V when off, above 13V when running (with engine on). And, while testing ...

Object Details maker Queen and Company Location Currently not on view Credit Line from the Smithsonian Astrophysical Observatory ID Number EM.314865 catalog number 314865 accession number 211531 ...