I ended up settling on a Dakota Lithium 54AH battery,with an 11 year warranty and a free charger,and it being a USA based company,I took a gamble. I did my research and this will be compatible with my Endura Max 45. At 17 pounds and what I have found online I should be able to troll all day,cut down on weight and footprint,and get longer life out of my battery. Throwing that much into an inflatable pontoon may be hard to swallow,but this is my main hobby. Fishing. To me it's worth it. I will report back after a season with a review. By then the batteries will be a third of the price and I will have wasted hundreds!