Quote Originally Posted by wiltw View Post
If you get the battery cover off, the next challenge is finding a mercury oxide battery, since they were discontinued due to environmental concerns. Mercury oxide batteries provided a fixed 1.35v that was unwavering, not like the alkaline batteries we use today, so do not try to substitute with alkaline!
Spotmatics use a bridge circuit in their meter, which makes them relative insensitive to voltage difference.
Any battery in the 1.3-1.5 range (alkaline, silver, ect) which you manage toi fit inside (most users use a rubber O-ring or similar to help) will work fine.