I have a 24' Sport with one battery under the hatch which is controlled by a Lenco electric jack. If the battery dies or the Lenco dies, I am in trouble. The hinges would be hard to remove and the lenco is still connected. How long will a Lenco last? Should I replace it? Pepe told me that I can provide power to the Lenco by connecting a low amp 12V source to the terminal block. Is it simply connecting the positive wire of a small battery charger to the positive side of the terminal and the negative wire to the negative side (ground)? Lastly, since the battery is close to the panel under the back seat can I wire the battery to external terminals just under the back seat? I once saw this in a California boat. Who makes these? Captain55