wrote:


I would like to test my 9V, C, D, AA, and AAA under the proper load.


** The ESR of a cell or battery is a good guide to its condition.

A fresh AA alkaline measures 0.1 ohms or lower while a tired one measures 1 ohm or greater, a fresh 9V measures under 1 ohm. Along with a voltage test you have enough info to match or discard used cells.

..... Phil