In rec.crafts.metalworking Ted Edwards wrote:
lcoe wrote:

charge NiMH, maybe a sample defecit. bu, my testing comports with a
web page that states, "NiMH" does _not_ exhibit the 'reverse' voltage
rise property of NiCAD's when reaching full charge.

They do but not as strongly. NiMH smart chargers will do NiCd but the
converse is usually false. Ted

that same site states ....termination methods used for NiMH, include temp
sensing...,..timer(?),...(other?)....

the RShack unit (returned now) had the switch for NiCadNiMH and two
values for the "backup" timer, 2hrs for the former, 1.5 hrs for the latter.
likely the product is simply a NiCad charger with timers but they do
provide two charging currents, 200ma(?)vs 800ma. (and they lie
thru their teeth about the additional modes). --Loren