Hey guys, I知 running a Minn Kota 112 lb 36 volt Ulterra on my Nitro Z-21. I crappie fish a lot pulling cranks. I currently am running three Interstate Group 29s. I知 tired of the Interstate batteries going bad on me 2-3 months after the 12 month warranty runs out. I知 running an X2 group 31 dual purpose for my cranking battery. Ok so my question is which battery is the best option to allow me to troll constantly for an all day fishing trip. Thanks for your input. I知 ready to bite the bullet and get three quality batteries that will last a long time. Thanks again.