OK, thanks Rickie, I haven't done a load test of the cranking battery, but it is a new boat, so I would expect the battery to still be good, I monitor supply voltage on both units, and the lowest I have ever seen is 11.9 volts towards the end of the day and then only when the aerator kicks on and then it is no more than a .1 volt drip from 12 volts to 11.9 volts. Both units are connected direct to the cranking battery, not the boat wiring or trolling motor batteries. I have not tried the restore defaults, I will do that today before I fish tomorrow and see if it helps. Again thanks.