If you can afford it, I recomend the Enersys Odysseyin my opinion it is the best trolling motor battery. ODYSSEY Batteries - Marine This is a local manufacture, they make these batteries in Warrensburg Missouri. They buy their lead from mines to the south of there. I've toured the plant and they put a lot of quality into the product, they also make jet and submarine batteries there. Very expensive, but better. Pure lead makes a difference.