Only other thing on the battery with the trolling motor is the bilge pump, which had not come on (I don't think the entire outing that eve), but I can switch that over. And i will see about getting a circuit breaker. So is the group 31 or dual 27 in reference to the circuit breaker model? Mine is not plugged in while charger for the record - and I have only had it a bit, but have an onboard charger. Also have charged those batteries with just a regular charger too. Does that make a difference?