Whatever batteries you buy, remember two things about them.... They're actually designed for different chores (and the battery you want as a starting battery isn't the battery you want as a trolling motor battery -for those you want a deep cycle battery meant to be fully charged then fully discharged over and over...). The second item to keep in mind is that different motors (and different motor sizes) have definite battery needs (make sure your new starting battery, whatever is can meet the cranking amps needed for that motor....). Hope this helps, post up whatever you finally decide on installing....