I think that's unlikey. The voltage is not too critical (it needs to be between 3-ish ance 5V, I think). I have had success using a couple of AA cells in series (normal 1.5V Duracells) as a replaemeent for a backup coil cell in some systems. No, they don't last as long (shelf life is lower), but they are avaialble _anywhere_. While you can, alas, no longer get mercury batteries, there are plenty of work-arounds for this. If the STT101 I've just picked up from my pile of odd cameras is anythign to go by, it takes a single PX13/PX625 cell. There is an alkaline equivelent that's the same size, but highter voltage, and I susepct, alas, the Mimnolta meter woudl care about that. Often connecting a single shottky diode in sereis with the cell will do the teick, if there's space inside the camera (sorry, I've not pulled the bottm plate to check), then it's easy to add it. If there isn't space, then there's a fairly expensive adapterwhich takes a smaller alkanline cell and includes a series diode. Or you could make soemthing like that. Or a new battrey cover containing contacts with wires leading to an external PSU of the right voltage.