Originally posted by ChopperCharles I thought the early spotmatics could not use the higher voltage cell?
Charles.
That rumor goes around every once in a while (your comment will probably give it a fresh start), but the experience of users here is that the Spotmatic meter is not voltage dependent, regardless of age or type. That being said, you might want to determine whether your camera is of the early (P/N 231) or late (P/N 23102) type. The part number is found on the back edge of the bottom plate. Mine is of the late type and works just fine with the S400PX battery.
Steve
P.S. The key is in how the battery check works.