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I'm still confused about the difference between NiCad and NiMh batteries.
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Both NiCad and NiMH AA batteries output 1.2 volts DC.
NiMH is advertised as having "no memory effect" (can be charged at any time during the use cycle, and do not need periodic "refreshing")
In general, current NiMH AA batteries have a higher current rating (mAh ... milliamp hours)
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Doesn't recharging the batteries prematurely decrease the performance of the battery?
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Not recharging the battery always results in a significant decrease in performance of the device powered by the battery, when the voltage drops below a certain level.
Discharge curve of NiMH:
Note how the voltage stays fairly constant to about 80% of capacity, then suddenly drops.