Ignition Module voltage range
I finally got around to checking the actual voltage range for the EVO RCEXL engine ignition.
Based on my testing it looks like it will work from 4.3 Volts to 8.4 Volts.
I didn't test for operation over the high end of the voltage range for obvious reasons, but I did want to test the low end.
While it is possible to use the EVO ignition module with a 4.8 Volt Nicad, or NiMH battery pack, it will be a problem if an IBEC is used with it, since that will drop the voltage by at least 0.6 Volts. Most meters used to check the pack will show OK down to 4.6 Volts, that will not be good for the ignition since it will be at only 4 Volts, 4.6 minus the IBEC drop of 0.6, and the ignition module will not fire.
All this is based on a limited sample, so there may be a couple of hundred millivolts error.