Thanks Mattking. I'll go with that. Silver is better than alkaline on the voltage discharge curve. I'd still be curious to know if Hass built a voltage regulator into the circuit, just for the sake of curiosity. A silver is better than an alkaline, but a mercury was better than them all.
Edited. Come to think of it this may be a dumb post. It occurred to me that if the original was mercury, it would have been only 5.4 volts. Wait--5.4 volts would fit in with it being named a 544 battery. I wonder what the 544 was in 1980. Now I'm going nuts. Any Hasselblad reps on here?
Last edited by Tom1956; 05-07-2013 at 01:08 AM. Click to view previous post history.