I have a 95 Basstracker TX 17 with a 40HP. Here is my question I have dual batteries one for the t-motor and one for the big motor. When I place the charger on the big motor it charges fine and the light on the charger will come on that says fully charged but no matter how long I leave it on the trolling motor battery I will never get a charge complete light on the charger. I have used my Multimeter and checked the trolling motor battery and it shows 12.96 volts. Does this mean that I should replace the battery. It will last all day on the water but if i want to go for a 2 or 3 day camping/fishing trip and do not want any problems.