i was thinking... how practical would it be to power a fluke 77 (or similar) from a stack of 3x CR2032 cells?
1. a stack of 3 would easily fit within the volume of a PP3 battery. indeed, two stacks of 3 would fit along with a couple of schottky diodes and terminal clips;
2. the capacity of a CR2032 is around 250mA/h 250mA.h, versus something like 500mA/h 500mA.h for a PP3;
3. the battery housing could be 3d printed, or made out of a stack of PCB material, or consist of a single PCB with metal holder clips (2 on top, 1 underneath);
4. CR2032 cells are really cheap.
i just did a quick test, with a stack of 3x CR2032 cells totalling 9.3 volts and having no trouble supplying the 500uA or so needed.
an interesting idea?
cheers,
rob :-)