P. J. Alling wrote:
You should be able to use Silver Oxide or Lithium replacements directly in your Spotmatic, (get a rubber O ring that just fits around the battery to make a relatively tight fit.. However if you really want the correct voltage, or close anyway, you can use Zinc (Wein) cells, these are often available in multi packs as hearing aid batteries. There is a third solution, there is a company making/selling an adapter that cuts the 1.5 volt output of modern batteries down to the 3.5 volt mercury output. A search of the Internet should turn them up. I believe they just screw into the camera where the battery cover fits, a bit pricey if I remember correctly.
www.criscam.com The adapter for a button cell costs about thirty dollars.
