With respect to discharging a pack consisting of several series cells, if the criteria is to prevent the weakest cell from reversing polarity due to the load current, then the only game in town is to monitor the pack voltage, and stop discharging when the total pack voltage drops. Otherwise, you would need as many voltage monitors as there are cells in the pack.
Here is the discharge curve for 2000mAh NiMh cells, reproduced below.
In a four-cell pack, if you use a cutoff voltage of 0.95V per cell, that would mean a pack cutoff voltage of 3.8V. If the pack contained one weaker cell and three healthy cells that still had 1.1V per cell, the load cuttoff would occur just as the weak cell reaches 3.8-3*1.1 = 0.5V
Here is the discharge curve for 2000mAh NiMh cells, reproduced below.
In a four-cell pack, if you use a cutoff voltage of 0.95V per cell, that would mean a pack cutoff voltage of 3.8V. If the pack contained one weaker cell and three healthy cells that still had 1.1V per cell, the load cuttoff would occur just as the weak cell reaches 3.8-3*1.1 = 0.5V