starman wrote in message ...
Mark Keith wrote:

The nickle
hydrides are slightly different. The charge voltages are about the
same, but when they are fully charged, the voltage peaks, but then
slightly drops off a bit. This indicates full charge. This is why they
have separate chargers, or switchable ones that do both types for
nicads vs nickle hydride.

The nickel cadmium (NiCd) battery is the kind that reaches a peak
voltage and drops off a little when it's fully charged. The NiMh don't
do this.

Sure they do. http://data.energizer.com/batteryinf...al_hydride.htm
But I do notice they seem to indicate temp monitoring is preferred to
voltage for overcharge cutoff. But for the average user, voltage is
probably easier to measure. MK