I was wondering about the condition of the power supply board. This engine has an upgrade kit thats about 5 years old and only gets run occasionally. When I charged the cap on the bench with my lab power supply it charged almost immediately to 4.1 volts
After two days it was still reading 2 75 volts.
Anyway now with dual supercaps it works every time. Next time I will probably go with the one "Upstate" (aka neighbor) John H showed above. I like the specs.
Pete