MattK - again, thanks for the great info! I have/had Panasonic, Surefire, Streamlight, and Energizer 123A cells and they all look identical in physical appearance. The Rayovacs I have look different tho. For the Sanyos, the latest batch I have were made in China. Not sure if Sanyo has a factory out there.
So, is Panasonic the largest 123A manufacturer since they manufacturer for other big brands such as Energizer/Eveready and possibly even Rayovac and Sanyo? How do these battery big boys (Panasonic, Eveready, Duracell, Sanyo, Rayovac) rank in size and mfr'ing capability?