"Jere Lull" wrote
Careful, that "lighting coil" may not be rectified. Good enough for
lights, but not for charging.

I'm sure it isn't, that's why I mentioned adding a rectifier/regulator. I
was thinking of maybe one of the generic ATV/off road types like this:
http://www.parkeryamaha.com/index.as...D&ProdID=31675