Fellow Allison owners, I have an xb2003 with a warmed up 225 Super Magnum Mariner, and I have been using two 100 AH lead/acid batteries to start my motor and run my X5 Motorguide trolling motor. I am going to be 69 in October. My batteries are over four Years old and have held up well. They weigh 104 pounds combined. I seldom fish more than five hours, most of the time only two or three hours. I’d like to lighten up even more on the battery weight. I’d like some experienced opinions whether I can get by with two 50 AH LifePo trolling batteries and a lithium cranking battery, or if possible could I use two 100 AH batteries and crank with one and use both for the troller. The X5 pulls 56 amps when on high, but usually I have it down on three and rarely on 10. In Feb and March, I do fish some fairly swift water which requires that I turn up the troller. What is the best route to go and which brand would you suggest. I found a company named FuelZero that sells a good looking 12V 50AH battery for $339.00. Please give me your suggestions.