I have one of Dan's afterburner ring controllers in my F-104 and it runs off a 2S lipo plugged directly into it. I suspect the multi-watt is the same....but a quick call to Dan will eliminate any concerns. I've found him to be very helpful over the phone. I think he talked me through the auto drag chute programming 3 times before the lightbulb went off.

Btw, these pics were taken in the middle of the day.