I have a 24 volt trolling motor and of course have two 12 volts batteries , the batteries are group 27. I don't fish into the current much unless the wind or current is really moving so I don't use the trolling motor much. I have to buy new trolling motor batteries and I'm thinking about getting two group 31 batteries. The two group 31 batteries are 7 pounds heavier than the 27. I have never had trouble with the trolling motor going dead but I will be fishing my first 3 day tournament this year and was wondering am I going to see boat performance issues ? Maybe more Chine ? It's also your guy's and no you guys......ha ha thats my redneck coming out