Dumdass, thanks for the tips and yes, after I charged it the power was back on but @ this point I am not positive of the cause of failure because @ the time I thought it was low charge & so put the charger on it immediately & in 1-1/2 hrs it was charged---too short a time for complete battery drain---I had not thought to just let it cool for a while & try the power---I am learning!
In another forum I was told for fact the motor has overheat protection sensors & from the way the response was worded I think the controller itself may have them. Although the trike climbs the bridges fine in higher gears I am going to try the ridges in low low gear to make the climb easier on the system.