1501 wrote:
One thing to be aware of when using rechargeable batteries where the
kit may have been designed for dry cells is the probability/
possibility of batteries appearing flat prematurely. There isn't a
huge difference in the voltage generated by a flat dry cell and that
of a half charged NiCd or NiMH cell.

Many of the guys running RC planes and boats run the receivers on 5
rechargeable cells (at 1.2V each) instead of 4 dry cells (at 1.5V
each) to overcome this problem.

No. most RC guys run on FOUR cells (4.8v)

Dry cells have not been part of the receiver scene since the mid 60's

They use 5 cells (6v) for faster and more powerful servo response.