Don't get too fussed about having both batteries connected, the risks
are much overstated by the scary bananas brigade & yes the old OB
charging systems did show some high voltages but remember they never put
out much real power (amps). It takes high volts & high amps

Thanks Karen,
In spite of the high voltage and all the doom everyone warned me about, nothing
was ever hurt. I just find it interesting that no one I have ever found can
explain to me WHY they would make something that could do this and how mine ran
perfect for years and all of a sudden decided to run at 16 volts. Its only 5
amps so I guess its just a personal thing with me