BArb M, ACTUALLY there used to be a whole bunch of A batteries, when there were only A, B and C batteries for radios, not the little round ones we use for flashlights, and so many other devices now, but ANY battery used to supply power to light up radio tubes, so they could conduct electricity, were called A batteries, there were several types and sizes in use. I do not believe the batteries were ever marked "A", just the connector from the radio was marked "A" . Next week we can discuss combination A+B, or A+B+C batteries, unless everyone has been put to sleep by my discourse! Ken B