What is the recommended battery chemistry for digital multimeters?
What is the recommended battery chemistry for digital multimeters?


If you have a reputable meter the device's data sheet or manual will tell you what battery chemistry to use and specifically what battery they recommend.


  I would like to know if the different internal resistances of
  different battery chemistry somehow affects the calibration of a
  digital multi-meter.


Low power hand-held meters consume very little power at all so this means they consume just a few tens to hundreds of microamps (when on) and this will not cause a significant volt drop across the battery internal resistance so it won't affect calibration. In addition, it is likely that meters use precision references to generate reference voltages and these chips will still be operating fine when the battery voltage has dropped to a level such that the LCD display is beginning to look a little low contrast.

If you need more clarification then you should post a specific circuit from a reputable supplier so that it can be analysed.

Footnote - my old Tandy DVM was bought in the early 90s and is still going strong on the original battery. I expect I'll need to replace it in the next ten years or so.