Originally Posted by Skiddins
True, but all battery packs are above their 'nominal' voltage when fully charged, my 9.6V transmitter battery is 11.5V once charged.
yeah, but 8.4 volts is greater than a 6.0 volt speed control output. You will still get 6 volts out of the speedo regardless of input voltage.
Also, a five cell pack will peak at around 7.5 volts, (as in receiver pack), which is also a bit less than 8.4 volts, plus with a nimh that will drop down drastically the moment it is pulled from the charger.