According to those in the know (not me) RECHARGABLES just do not
work...

The claim is that 8 rechargable AA's only put out a total of 9.6 v not
when freshly charge not the 12 V that the regular AA's put out... so
while the rechargables will work for 10 minutes when the voltage even
drops a hair all hell breaks loose because the scope dances all over
the sky ... instead of slewing to Jupiter or some specific target...

Not that it makes any difference because everyone runs off a 12 V Gel
cell battery or regulated power supply anyway... BUT is it really true
that a rechargable AA does not puty out a full 1.5 V when freshly
charged...

Bob G

According to those who know the rechargeable low self discharge
NIMH batteries that are usually termed hybrid will work in most
applications.

The exception is your example above. In that case and some others
the electronics were designed for 1.5 volt alkaline's and the circuit
will deliberately shut down or malfunction if it doesn't see the
expected voltage.

Most circuits are not designed to be so voltage sensitive. The NIMH
AA's have plenty of power down to about 1.15 volts per cell. Most
simple battery operated devices will work at this voltage.