0.1V of what endpoint?? The consumer is supposed to take measurements with a meter, produce a chart and decide that the voltage has already gone through the peak, very weakly pronounced in the case of NiMH. I would appreciate if you could record your actions and post them on YouTube or elsewhere so all of us stupid getting smart chargers could learn.
+1 if you are using a cheap charger you are either going to over or undercharge every battery you put in it - what are you suggesting, checking the battery with a multimeter every 10 seconds in a vain hope of detecting a minute voltage drop ??
I think the OP is hoping for good advice.
